how to do the homework, I went to ask my teacher for help.A．Not to knowB．
题型：不详难度：来源：
how to do the homework, I went to ask my teacher for help.| A．Not to know | B．Not knowing | C．Knowing not | D．Not known |
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答案
| B |
解析
| 考查非谓语动词。分词的否定式应在其前面加not,主语I 与动词know 之间是主动关系，所以用现在分词。故选B。 |
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