V. Complet the sentences with the words below. orbit operate comet float microgravity launch mission astronaut astronomy spacesuit 1. The mission not only taught NASA about Venus, but also how to ................a spacecraft far from Earth. 2. The tail of a ............can extend over 84 million miles, nearly the distance between the earth and the sun. 3. The ...............of Apollo 11 was land two men on the lunar surface and return them safely to earth. 4. Sally Ride became the first American woman..............to fly in space in 1983 when she was 32 years old. 5. People ...............in space because there is no gravity to pull them towards anything. 6. In ................ astronauts can move things that weigh hundreds of pounds with just the tips of their fingers. 7. The ..........of Apollo 13 was delayed from March 12th to April 11th, 1970 to give the new prime crew more time to train. 8. Was Vietnam's first telecom satellite Vinasat-1 put into .................. on April 18th, 2008? 9. This .............was worn by astronaut Neil Armstrong , the first human to set foot on the Moon. 10.Quang is interested in ..............he can send hours studying the sun, moon, stars and planets. VI. Choose the word or phrase to fill in each gap. How old ..............(1) you be on friday 13, 2029? That is how old you will be when a large asteroid, called Apophis, comes very, very close to ..............(2) planet. Asteroids are rocks that circle the sun in space and sometimes ............(3) close to Earth and even hit it. Most asteroids are very small and, if you are lucky, you can sometimes see ...........(4) in the night sky as " falling stars". However, most scientists .................(5) one large asteroid, about six to twelve kilometers across, hit the Earth and killed all the dinosaurs about 65 million years ago. Apophis is also big. Scientists ................(6) it .............(7) 2004 and they say that it is about 300 meters across. That is about the size of a large sports stadium. An asteroid this size , according to scientists , is ............(8) large enough to destroy our world, but it is large enough to destroy several cities. It will probably miss the earth, they say, but not by very much - it will miss .............(9) by about 35000 km that is much closer than our moon which is about 24000 km away. Another way of thinking about it is that it will be ............(10) us by only few minutes. 1. A. are B. will C. do D. can 2. A. our B. us C. ours D. we 3. A. came B. comes C. coming D. come 4. A. they B. their C. them D. they are 5. A. believe B. believed C. believes D. believing 6. A. discovering B. discovered C. discover D. discovers 7. A. on B. at C. in D. to 8. A. no B. don't C. isn't D. not 9. A. we B. us C. our D. ours 10. A. missed B. misses C. missing D. miss