You_all the trouble had you know she has not there.A.mustn't take B.needn't take C.mustn't have taken D.needn't have taken

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You_all the trouble had you know she has not there.A.mustn't take B.needn't take C.mustn't have taken D.needn't have taken

You_all the trouble had you know she has not there.A.mustn't take B.needn't take C.mustn't have taken D.needn't have taken
You_all the trouble had you know she has not there.A.mustn't take B.needn't take C.mustn't have t
aken D.needn't have taken

You_all the trouble had you know she has not there.A.mustn't take B.needn't take C.mustn't have taken D.needn't have taken
D 虚拟语气 needn't have done "本没有必要做(但实际上做了)"
had you known =if you had known 表事情发生在过去

B