1 . Their answers are exactly the same－one of them must _______ (copy) from the other. (所给词的适当形式填空)

2 . There is no one in the room, so Tom must __________(leave) before I arrived here. (所给词的适当形式填空)

3 . Since nobody gave him any help, he must__________(fix) the door on his own. It looks good though. (所给词的适当形式填空)

4 . Look at his sad face! He must ________(hear) of the bad news. (用所给词的适当形式填空)

5 . It ________ (rain) last night, for the ground is wet. (所给词的适当形式填空)

6 . You ________ (do) something great, otherwise you wouldn’t have got the promotion. （所给词的适当形式填空）

7 . He must ________ (go) through a lot when he was in prison. （所给词的适当形式填空）

8 . Jack must have been playing football and Mary ________ (do) her homework. (所给词的适当形式填空)

9 . You ________ have ever been in a situation where you know the other person is right yet you cannot agree with him. (用适当的词填空)

10 . Someone ________ (use) my umbrella yesterday. I found it wet. （所给词的适当形式填空）