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    精英家教网 > 高中英语 > 题目详情
    ____ I'm mistaken, I've seen that tall man at a party before.
    A．IfB．AsC．UnlessD．When
    C

    试题分析：句意：如果我没有认错的话，我以前在聚会上见过那个人。这里用unless引导条件状语从句，意思是“除非，如果不”，if引导条件状语从句，意思是“如果”，As“正如，因为，随着”，when“当…时候”，引导时间状语从句。所以选C。
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