题目内容

After a long walk,the old man be tired now.

A.can’t B.must

C.has to D.need

B

【解析】

试题分析:句意：长时间步行之后，老人现在肯定累了。A：不可能B：一定C：不得不D：需要。根据句意判断选B。

考点：考查情态动词。

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