题目内容
12. We should clean our teeth twice a day.(改为被动语态)
Our teeth should twice a day.
12. be cleaned
17. 你不应该在动物园里喂动物。
Animals ____ __________ __________ by you in the zoo.
21. 过去人们放飞孔明灯是为了在危难中求助。
In the old days,people sky lanterns ________ ________ ________ help when in
trouhle.
( ) 9. I still can't believe it! Three men in that accident last night.
A. were killed B. are killed
C. were killing D. have killed
19. 在上学的路上,李磊掉入了河中。
Li Lei the river on his way to school.
20. 电话是什么时候被发明的?
When the telephone ?
7. The stars can (not see) in the daytime.
( ) 4. Please call us when you are .
A. in trouble B. in help
C. get trouble D. in hope
7. So (heat) weather! What about going swimming?