International Space Station: A High School English Cloze Test

The International Space Station (ISS) is a '1' laboratory that orbits Earth at an altitude of about 400 kilometers. It is a joint project of five space agencies: NASA, Roscosmos, JAXA, ESA, and CSA.

The ISS was '2' in 1998 and has been continuously inhabited since November 2000. It is about the size of a football field and weighs about 420,000 kilograms. The station has enough living space for six astronauts and is equipped with laboratories, sleeping quarters, exercise equipment, and a '3' with a 360-degree view of Earth.

One of the main objectives of the ISS is to conduct scientific research in '4' such as biology, physics, and astronomy. Astronauts on the ISS have conducted experiments in microgravity, studied the effects of long-term space flight on the human body, and observed a wide range of '5' phenomena.

The ISS has been visited by over 200 astronauts from 19 different countries. They travel to the station aboard spacecraft such as the Soyuz and the SpaceX Dragon. These spacecraft are launched from Earth and dock with the ISS using a system of '6'.

Living and working on the ISS is a unique experience. Astronauts must '7' their food, water, and oxygen supply, as well as their waste. They must also exercise for several hours every day to prevent muscle and bone loss, which are common in microgravity.

Despite the challenges, many astronauts describe their time on the ISS as the '8' of their careers. They have the opportunity to conduct groundbreaking research, observe the beauty of Earth from space, and collaborate with scientists and engineers from around the world.

The ISS is scheduled to remain in operation until at least 2024, with the possibility of extension to 2028 or beyond. It is a symbol of international cooperation and human '9' and has paved the way for future exploration of space.

As NASA astronaut Scott Kelly said, "Being on the International Space Station is like '10' in a dream."

1. A. scientific
2. B. launched
3. C. observatory
4. D. agriculture
5. E. astronomical
6. F. docking
7. G. recycle
8. H. highlight
9. I. advancement
10. J. traveling

答案：

1. A
2. B
3. C
4. A
5. E
6. F
7. G
8. H
9. I
10. J