问题: 英语
--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
解答:
选C
如果把这句话转为陈述句的话,语序为it is + 时间段 + before +过去式...
这是关于before的固定句型
若选since,那么是:
how long do you think it has been since he arrived here?
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