It’s the first time he has helped us.A. that B. before C. whenD. who

发布时间：2020-08-16 16:30:53

It’s the first time      he has helped us. 
A. that
B. before
C. when
D. who

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(答案→)A. that
B. before
C. when
D. who
解析：考查连词。本题考查强调结构it’s … that …，强调状语the first time，故选A。
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