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    精英家教网 > 高中英语 > 题目详情
    Mary and I have been close friends ______ we met each other 10 years ago.
    A．whenB．sinceC．untilD．as
    B

    试题分析：考查连词：A. when当…时候B. since自从C. until直到. As因为，句意：玛丽和我自从10年前认识，一直是好朋友。选B。
    点评：连词的辨析要放在上下文去进行，同时要注意一些形式相近的连词的词义辨析。Since的用法还可以从时态判断。
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