-How long do you think it is he arrived here?-No more than half a year, I believe.

发布时间：2020-08-21 12:45:50

---- How long do you think it is     he arrived here?
---- No more than half a year, I believe.
A. when
B. that
C. before
D. since

网友回答

A. when
B. that
C. before
(答案→)D. since
解析：考查固定短语。句意：自他到这儿以来，你认为多久啊？故用since。
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