【推荐1】Hurry up! They________(wait) for us now. (所给词的适当形式填空)

【推荐2】Do you want to be a good public speaker? Here are some principles you ________ master. (用适当的词填空)

【推荐3】He ________ have completed his work; otherwise, he wouldn't be enjoying himself by the seaside. （用适当的词填空）

【推荐1】The lady ________ have done something wrong, because she is looking guilty. (用适当的词填空)

【推荐2】—I rang your home yesterday. A man answered, but I didn’t recognize the voice.
—Oh, it ________have been my brother, Peter. （用适当的词填空）

【推荐3】用＂情态动词+have done＂完成句子
1. —Sorry, Mum! I failed the English exam again.
—Oh, it’s too bad.You __________________ (make) full preparations.
2. I ________________(worry) before I came to the new school, for my classmates here are very friendly to me.
3. We __________________ (face) the difficulty together, but why didn’t you tell me?
4. Tom is feeling uncomfortable. He _____________ (drink) too much at the party last night.