5.如果conj._ 6.除非conj._

7.消失v._ 8.练习v._

1.相像的；类似的adj._ 2.记住v._

3.不同的adj._ 4.信息n._

10. When was    ( be) the first man-made satellite

sent ( send) up into space?

9. I don’t think teenagers should get their ears pierced (pierce).

8. John was heard ( hear) to go upstairs two hours ago.

7. How many magazines can be borrowed ( can borrow) in your library every week?

6. Last year vegetables were grown ( grow) in the garden by Tom and he sold them himself.

5. Parents should encourage their children to do (do) some social work for the community.

4. Snakes and tigers are dangerous ( danger) animals, we must keep away from them.

3. Wang Peng regretted telling ( tell) his mother the bad news as soon as he saw her.