The police needed more evidence they could draw a conclusion．( )A．sinceB．afterC．beforeD．until 题目和参考答案——青夏教育精英家教网—

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12．The police needed more evidence they could draw a conclusion．（　　）

A．

since

B．

after

C．

before

D．

until

分析警方需要更多的证据才能得出结论．/在警方得出结论之前，他们需要更多的证据．

解答答案C．
since意思是"自从…以来"时，引导时间状语从句；意思是"既然"时，引导原因状语从句．after"在…之后"，引导时间状语从句．before"在…之前；才…"，引导时间状语从句．until"直到"，引导时间状语从句．这四个从属连词有一个共同点是都可以引导时间状语从句，但从动作发生的时间上来分析可知，needed发生在could draw之前，故答案选C．

点评本题考查从属连词的用法．连词的用法辨析，要注意分析主从句之间的逻辑关系，再确定相应的连词，同时注意不同的连词的语义及用法区别．

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