It has been two years he came to China. A. sinceB. afterC. beforeD. till

发布时间：2020-08-22 01:12:32

It has been two years      he came to China.
A. since
B. after
C. before
D. till

网友回答

(答案→)A. since
B. after
C. before
D. till
解析：本题考查的是since引导的时间状语从句，since引导的从句为一般过去时，其主句为现在完成时，故选答案为A
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