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(06’天津卷)A. needn’t B. may not C. shouldn’t D. mustn’t Key:[B]5.can/could have+過去分詞 表示“過去本來可以做某事,但實(shí)際上沒有做”;否定句表示“不可能已做了某事”;疑問句表示“可能/也許已做了某事嗎?”。 I stayed at a hotel while in New York . Oh, did you? You ____ with Barbara. (NMET’98) A. could have stayed B. could stayC. would stay D. must have stayed Key: [A]鞏固性練習(xí):從A、B、C、D中選擇最佳答案。1.You didn’t wait for Mr. Smith last night, did you?No, but we ______. He didn’t return home at all.A. couldn’t have waited B. needn’t haveC. didn’t need to D. should wait2.Harry ______ have won the Physics petition easily yesterday, but he gave up. A. could B. might C. should D. must3.May I speak to your manager Mr. Smith at six o’clock tonight ?”“I’m sorry, Mr. Smith to a conference before then.”A. will have gone B. had gone C. would have gone D. has gone4.Tom took away our teacher’s cell phone without being permitted. Really? I can’t imagine that he _______ have done such a thing.A. must B. may C. can D. should5. Was it you that made the suggestion? It