Trắc nghiệm Tiếng Anh 8 Unit 6 (Smart World có đáp án): Reading & Writing

Past Explanations for UFOs

    An unidentified flying object, or UFO, is anything in the sky that the person who sees it cannot explain. Some people believe UFOs are alien spacecraft. However, most scientists believe that it can be easier to explain UFOs. A UFO has different descriptions. It can take the form of a disk, triangle or even an egg. After a sighting of a disk-shaped UFO in the 1940s, the term “flying saucer” became popular. It soon became fashionable to call all UFOs flying saucers. Nowadays, there are records of thousands of UFO sightings. These are photographs of UFOs and conversations with the people who saw UFOs.

    In the 1950s, a government asked a group of scientists to study hundreds of sightings. However, most sightings were just space objects like stars, planets or meteors. A lot of other sightings were only aircraft, birds or hot gases. However, such things didn’t stop people from reporting UFOs. By the mid-1960s, there were even more sightings of UFOs than ever. People also found that most UFO or alien sightings happened in bad weather. But governments around the world still believed that UFOs were unreal. Other scientists agreed. But it was hard to explain why UFOs still appeared. Nowadays, researchers believe that UFOs might be visitors from space.

Past Explanations for UFOs

    An unidentified flying object, or UFO, is anything in the sky that the person who sees it cannot explain. Some people believe UFOs are alien spacecraft. However, most scientists believe that it can be easier to explain UFOs. A UFO has different descriptions. It can take the form of a disk, triangle or even an egg. After a sighting of a disk-shaped UFO in the 1940s, the term “flying saucer” became popular. It soon became fashionable to call all UFOs flying saucers. Nowadays, there are records of thousands of UFO sightings. These are photographs of UFOs and conversations with the people who saw UFOs.

    In the 1950s, a government asked a group of scientists to study hundreds of sightings. However, most sightings were just space objects like stars, planets or meteors. A lot of other sightings were only aircraft, birds or hot gases. However, such things didn’t stop people from reporting UFOs. By the mid-1960s, there were even more sightings of UFOs than ever. People also found that most UFO or alien sightings happened in bad weather. But governments around the world still believed that UFOs were unreal. Other scientists agreed. But it was hard to explain why UFOs still appeared. Nowadays, researchers believe that UFOs might be visitors from space.

Past Explanations for UFOs

    An unidentified flying object, or UFO, is anything in the sky that the person who sees it cannot explain. Some people believe UFOs are alien spacecraft. However, most scientists believe that it can be easier to explain UFOs. A UFO has different descriptions. It can take the form of a disk, triangle or even an egg. After a sighting of a disk-shaped UFO in the 1940s, the term “flying saucer” became popular. It soon became fashionable to call all UFOs flying saucers. Nowadays, there are records of thousands of UFO sightings. These are photographs of UFOs and conversations with the people who saw UFOs.

    In the 1950s, a government asked a group of scientists to study hundreds of sightings. However, most sightings were just space objects like stars, planets or meteors. A lot of other sightings were only aircraft, birds or hot gases. However, such things didn’t stop people from reporting UFOs. By the mid-1960s, there were even more sightings of UFOs than ever. People also found that most UFO or alien sightings happened in bad weather. But governments around the world still believed that UFOs were unreal. Other scientists agreed. But it was hard to explain why UFOs still appeared. Nowadays, researchers believe that UFOs might be visitors from space.

Past Explanations for UFOs

    An unidentified flying object, or UFO, is anything in the sky that the person who sees it cannot explain. Some people believe UFOs are alien spacecraft. However, most scientists believe that it can be easier to explain UFOs. A UFO has different descriptions. It can take the form of a disk, triangle or even an egg. After a sighting of a disk-shaped UFO in the 1940s, the term “flying saucer” became popular. It soon became fashionable to call all UFOs flying saucers. Nowadays, there are records of thousands of UFO sightings. These are photographs of UFOs and conversations with the people who saw UFOs.

    In the 1950s, a government asked a group of scientists to study hundreds of sightings. However, most sightings were just space objects like stars, planets or meteors. A lot of other sightings were only aircraft, birds or hot gases. However, such things didn’t stop people from reporting UFOs. By the mid-1960s, there were even more sightings of UFOs than ever. People also found that most UFO or alien sightings happened in bad weather. But governments around the world still believed that UFOs were unreal. Other scientists agreed. But it was hard to explain why UFOs still appeared. Nowadays, researchers believe that UFOs might be visitors from space.

Past Explanations for UFOs

    An unidentified flying object, or UFO, is anything in the sky that the person who sees it cannot explain. Some people believe UFOs are alien spacecraft. However, most scientists believe that it can be easier to explain UFOs. A UFO has different descriptions. It can take the form of a disk, triangle or even an egg. After a sighting of a disk-shaped UFO in the 1940s, the term “flying saucer” became popular. It soon became fashionable to call all UFOs flying saucers. Nowadays, there are records of thousands of UFO sightings. These are photographs of UFOs and conversations with the people who saw UFOs.

    In the 1950s, a government asked a group of scientists to study hundreds of sightings. However, most sightings were just space objects like stars, planets or meteors. A lot of other sightings were only aircraft, birds or hot gases. However, such things didn’t stop people from reporting UFOs. By the mid-1960s, there were even more sightings of UFOs than ever. People also found that most UFO or alien sightings happened in bad weather. But governments around the world still believed that UFOs were unreal. Other scientists agreed. But it was hard to explain why UFOs still appeared. Nowadays, researchers believe that UFOs might be visitors from space.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.

A

The first astronauts to come into space only went up for short trips to see what it was like. Astronauts may now spend weeks or even months living and working in space. They live in a large spacecraft that they often call a space station, which circles or travels around Earth. The astronauts on board spend their days doing scientific studies such as examining the effects of space on the human body and the growth of plants. They also keep the space station running in the right direction.

B

Living in space for a long time will affect an astronaut’s body. Many astronauts get space sicknesses, such as a cold head, stuffy nose or puffy face, shortly after entering space. That is because there is not enough gravity in space. Astronauts will have to exercise to stop their muscles from becoming weak. They also need to monitor their bodies to ensure good health and research the effects of space travel on the human body. Besides doing their jobs, astronauts do the same activities back on Earth. For example, they will eat their meals, sleep, relax and enjoy themselves.

C

Eating food in space is a real challenge. In space, everything will become weightless and start to float away. For instance, food will not stay on a plate, and drinks will drift away from a glass. For that reason, people will have to put them in some special packages, so the astronauts will be able to eat the food directly from the packages. For each space travel, astronauts will bring freeze-dried food. The food will become soft and sticky after the astronauts add water and heat them. They have fresh food delivery from Earth, too.