LastnightLiPingwatchedthefootballmatchathomewhenhe______hishomework.A

发布时间：2020-08-13 15:14:51

Last night Li Ping watched the football match at home when he ______ his homework.A.need have doneB.must haven doneC.should have doneD.could have worked

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C解析考察虚拟语气。句意：当他应该写作业的时候，昨晚丽萍在家看足球比赛了。“should+have+done”意思是“本来应该做某事，而实际没做。”故选C。
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