He had struggled for five hours.trying to find an exit firemen arrived．( )A．asB．andC．beforeD．while 题目和参考答案——青夏教育精英家教网——

题目内容

7．He had struggled for five hours，trying to find an exit （出口） ______firemen arrived．（　　）

A．

as

B．

and

C．

before

D．

while

分析他已经挣扎了5个小时，尽力在消防人员到达之前找到一个出口．

解答答案：C；A．当…时候，由于； B．连词"和"；C．在…之前；D．正当…的时候；根据语境理解，尽力在消防人员到达之前找到一个出口，在…之前，before，故选C．

点评考查介词介词和连词的用法，考生注意积累．

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