_____ how to deal with the trouble of the computer, Martin had to ask his brother for help.

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问题 _____ how to deal with the trouble of the computer, Martin had to ask his brother for help.

选项 A、Not know
B、Not known
C、Not to know
D、Not knowing

答案D

解析 本题考查的是分词作状语。分词短语可以作原因、条件、伴随、时间、结果等状语成分。句子的主语与分词的逻辑主语应是一致的。如果分词与其逻辑主语间是主动关系,用现在分词表示;本句中know与它的逻辑主语Martin之间是主动关系,因此用现在分词表示,故选项D为正确答案。
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