摘要：It Mike and Mary who helped the old man several days ago. A.were B.was C. are D. had been
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It ______ Mike and Mary who helped the old man several days ago.
A. were B. are C. was D. had been
查看习题详情和答案>>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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