It Mike and Mary who helped the old man several days ago.A. wasB. wereC. areD. had been

发布时间：2020-08-16 07:37:59

It      Mike and Mary who helped the old man several days ago.
A. was
B. were
C. are
D. had been

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(答案→)A. was
B. were
C. are
D. had been
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