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    We need some more facts and figures __________ we take the final decision.

    A．sinceB．beforeC．afterD．until

    B

    解析试题分析：考查连词的用法，A. since自从；B. before在…之前；before主要引导时间状语从句，意为“先于”“…之后才”“(不多久)就…”。当主句是将来时时，从句谓语动词须用现在时；当主句是一般过去时或过去完成时时，从句常用过去时。before引导的时间状语从句不能用于否定式。C. after在…之后；D. until直到…，句子意思“在我们做最后决定之前我们需要一些证据和数据”
    考点：考查连词的用法
    点评：连词是高考常考内容，判断从句中用哪个连词，需用记住连词的用法，在句中的作用，需要考生平时多练习。
    即学即练：We hadn’t been out for long _________ she felt sick.
    A. as      B. while      C. after         D. before
    选D   句意：我们还没出去多久她就生病了。

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