题目内容
It is almost five years__________ we saw each other last time.?
A.before B.since C.after D.when
B?
解析:
解此题的关键在于主句与从句在时态上保持一致。用A、C、D三项的连接词引导时间状语从句时，与主句的时态明显不一致。since引导从句时常用过去时，主句则用一般现在时或现在完成时。?
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