8. My cousin is a student and he　 　　　　　　(study) at a middle school nearby.

7. Tony will come to my birthday party if it　 　　　　　　　　　(not rain) tomorrow.　

6. The Kings 　　　　　　　(watch) TV at this time last night.

5. Mr Green 　　　　　　　(live) in Beijing since he came to China.

4. Mr Huang　　　　　　　 (teach) us English two yearsago.

3. Linda　　　　　　 　(visit) the Science Museum nextSunday.

2. Peter 　　　　　　　(go) to watch the basketballmatch if he is free tomorrow.　

1. How often　 　　　　　　　your mother 　　　　　　　(go)shopping?

7. difference 8. care 9. healthy 10. uncomfortable

6._______ our environment is very important. Wherever you　live, you can do something around your neighbourhood.

Have you ever thrown 7._______ litter onto the ground? Have you ever drawn pictures on　public walls? Have you ever spat　in public? Have you ever 8. _______ trees? If your answers are “No”, it means that you have already helped 9. ________ our environment.

It is our duty to keep our environment　clean and tidy.　If everyone 10._______ to protect the environment, the world will become much more beautiful.

Unit 3