题目内容
—Mr. Li, let’s go fishing this weekend with Lao Wang, shall we?
—I’d love to, but nobody knows if he _______ free then.
A. will B. is C. will be D. has been
【答案】
C
【解析】在if 引导的宾语从句中,从句的时态,要根据本来的时态决定,故选C
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