Theboys________helplaughingwhenthe

发布时间：2020-07-10 00:30:52

The boys ________ help laughing when they heard the funny story.













A.can't












B.couldn't











C.are able to











D.mustn't

网友回答

B解析can't help doing“禁不住做某事”．本句中用can的过去时could．本句句意：男孩们听到这个笑话禁不住乐了起来．
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