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    精英家教网 > 高中英语 > 题目详情
    You should inspect the wheels regularly, and replace them ______ they cause you trouble.
    A．whileB．asC．beforeD．until
    C

    试题分析：考查连词辨析。A当…时；然而；B随着；C在…之前；D直到…才；句意：你应该在出事之前经常检查车轮并及时更换。故C正确。
    点评：连词before的用法是考查的重点内容，选择连词主要是看前后句的关系，因果关系用表因果的连词，转折关系用转折连词，并列关系用并列连词，要求考生具有一定的句子分析能力和词义辨析能力。
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