we both have worked here for three years,so we_____know each other

we both have worked here for three years,so we_____know each other

题目
we both have worked here for three years,so we_____know each other
A.come to B.came to C.have came to D.will came to
答案
C
come to know "(逐渐)开始认识” 指的还是现在的情况,与前文一致.此结构表示一个渐进过程
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