“ They went to the lecture but it had been put off.” “ Oh so they .”A. needn’t have gone

问题补充：

“ They went to the lecture, but it had been put off.” “ Oh, so they .”

A. needn’t have gone

B. should have gone

C. mustn’t have gone

D. don’t need to go

答案：

(答案→)A. needn’t have gone

B. should have gone

C. mustn’t have gone

D. don’t need to go

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