Result for exam 3

一、 1. have already known that; on
2. haven’t been to ; yet
3. astronauts have been to ; several times
4. Have ; read ; about ; solar system
5. so ; that ; have been
二、DDBAB ACDCC
三、1. discovered 2. galaxies 3. to 4. planets 5. system 
6. beyond 7. life 8. yet 9. form 10. message
四、 In the world today, more and more people are interested in sports and games. In our country, basketball, football and table tennis are the favourite sports and games. Early in the morning you can see people doing all kinds of exercises in parks, between trees and on some open grounds.
We all know that sports and games can keep people healthy and help people to do their work better. Let’s go in for sports and games.