问题: 一、单项选择
12、--Do you know him well?
--Sure.We_____friends since ten years ago.
A.were
B.have been
C.have become
D.have made
解答:
12、--Do you know him well?
--Sure.We__B___friends since ten years ago.
A.were
B.have been
C.have become
D.have made
这个是现在完成时,从过去某个时刻开始一直持续到现在,第三人称单数用has.
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