Itwasverykindofyoutodothewashing-upbutyou

问题详情：

 It was very kind of you to do the washing-up but you _____ it

A. needn’t do  B. shouldn’t do      C. mustn’t have done     D. needn’t have done

【回答】

D

知识点：虚拟语气与情态动词

题型：选择题