1.I can't find my books. They are________ (miss).
2.What's_______( happen) to them?
3.They were walking________ ( slowly) than us.
4.1 can hear someone______( cry) now.
5. Where have you______( be) ,Mr. Wang?
6.1 think he has_________( break) his leg.
7.He is     ( lie) on the ground.
8.We had better _______( get) you to the hospital.
9.They decide ______( go) and look for the little girl.

用所给单词的适当形式完成句子。

用所给单词的适当形式填空。