I____him for three years since we got to know about each other.A.have corresponded to B.had corresponded onC.have written letters D.have corresponded with

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I____him for three years since we got to know about each other.A.have corresponded to B.had corresponded onC.have written letters D.have corresponded with

I____him for three years since we got to know about each other.A.have corresponded to B.had corresponded onC.have written letters D.have corresponded with
I____him for three years since we got to know about each other.
A.have corresponded to B.had corresponded on
C.have written letters D.have corresponded with

I____him for three years since we got to know about each other.A.have corresponded to B.had corresponded onC.have written letters D.have corresponded with
1.选D.首先注意短语搭配：correspond with sb.与某人通信
write a letter to sb=write sb (a letter) 给某人写信
如：I wrote my mother a letter hurriedly.我匆忙地给我母亲写了封信.
从搭配上我们知道A、B介词搭配错误,C项少了介词to.
其次我们来分析这个句型：
since引导的时间状语从句要用一般过去时,而主句用现在完成时.所以D项从时态和搭配上都正确.

选B.我感觉，因为since作连词，一般用完成时，而since后连接的句子是过去时的语态，表明since前的面是在过去发生的，所以用过去完成时，

I____him for three years since we got to know about each other.A.have corresponded to B.had corresponded onC.have written letters D.have corresponded with three cheers for study for three study for three for year for year three for three years同义词求 for about three years(提问) Tom has( )for three years It goes for three weeks. for three quarters of an we are free for three I disappear for three days. three dollars for two pairs The y're three 快 for three weeks 的同义词组 I danced for three hours last 持续三个小时 ________ for three hours She buttonholed him for three hours yesterday.