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The man we followed suddenly stopped and looked as if ______

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The man we followed suddenly stopped and looked as if ________ whether he was going in the right direction.
A.seeing
B.having seen
C.to have seen
D.to see
The man we followed suddenly stopped and looked as if ______
答案D
as if,as though作从属连词引导方式状语从句时可以部分省略,构成as if后接现在分词、过去分词、不定式、形容词、副词、介词短语甚至名词形式,后接非谓语动词的不同形式表示不同的动作意义.本小题表示“他”往四周看,仿佛要弄清下一步该往哪儿走,用不定式表示没有发生的动作或目的