题目内容
4．His father has worked here ______he came here．（ ）| A． | when | B． | before | C． | since | D． | while |
分析 他的爸爸自从来到这里就在这里工作．
解答 答案：C；
结合语境推断句意是"他的爸爸自从来到这里就在这里工作．"，此句中主句中的谓语动词用了现在完成时，表示动作持续了多长时间，可以用for+时间段或since引导的一般过去时的时间状语从句；本题设空处后面的 he came here是一个句子，所以用since引导，故选C
点评 本题主要考查连词的用法，连词在句子中主要起联系上下文的作用，他们之间的区别就是表示逻辑关系的不同，所以在解题时先要理解上下文含义，然后根据上下文逻辑关系选择合适的连词．是做好此类题型的关键．
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