Question

【题目】Jack is my classmate. We ______ each other since he came to our school.

A. knew B. have known C. will know

Answer 1

【答案】B

【解析】

句意：杰克是我的同学。自从他来到我们学校，我们就认识了。A. knew一般过去时；B. have known现在完成时；C. will know一般将来时。时间状语从句“since he came to our school.”表示的是截止到目前为止的时间段，主句用现在完成时，故答案为B。