A. needn't have done B. must not have done C. shouldn't have done D. can not have done 10、The weather turned out to be fine yesterday. I ___ the trouble to carry my umbrella with me. A. should have taken B. could have taken C. needn't have taken D...
现在完成时(have/has done) ①表示动作到现在为止已经完成或刚刚完成,强调对现在产生的影响。 例:I bought a new house, but I haven t sold my old one yet, so at the moment I have two houses. 我买了一所新房子,但是还没有卖掉旧的,所以现在我又两所房子。
更多内容请点击：成人学士学位英语考试冲关指导7