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【题目】________ how to do the homework, I went to ask my teacher for help.

A. Not knownB. Not knowing

C. Not knowD. Not being known

【答案】B

【解析】

试题分析:考查非谓语动词句意不知道如何做作业我去问我的老师寻求帮助现在分词表示主语正在进行的伴随性动作和句子主语是主谓关系结合语境可知选B

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