1.______ what to do,he went to the manager for help.
A.Not to know B.Not knowing
C.Not having known D.Having not known
人气：303 ℃ 时间：2019-11-02 13:43:37
解答
B这是现在分词短语做原因状语的【Not knowing 】what to do,he went to the manager for help.由于不知道该怎么办,他便求助于经理= As he didn't know what to do,he went to the manager for help....
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