题目内容
The boys ________ help laughing when they heard the funny story.
- A.can't
- B.couldn't
- C.are able to
- D.mustn't
B
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.
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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