用括号里的正确形式填空和句型转换(用must have been/done 或can't have been/done改写句子）

用括号里的正确形式填空和句型转换(用must have been/done 或can't have been/done改写句子）
用括号里的正确形式填空：
1.Look! That man ______ (wave) to you.Do you know him?
2.The children were playing in the garden. They ________ (must,finish) their homework.
3.You must ____ (live) here for a long time. Yes,I have lived here for twentey years.
4.lease show me your ____ (dive) licence.
5.We have no time.You _____ （have) better hurry up.
6.The teacher wants you ______ (go) to her office an once.
7. What are those ? They must ______ (be)the pens he _______ (buy)yesterday.
8.We make up our minds _____ (go) to the country for our holiday.
9.Wemay _______ (travel) by air.
10.What was he doing? He may______ (read)a book in the garden.
句型转换(用must have been/done 或can't have been/done改写句子）：
1.I think your grandmother was sleeping.
2.I don't believe you were at home last night.
3.I think she was an actress.
4.I don't believe you were ill yesterday.
5.I don't think it snowed last night.