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