Question

【题目】It _____ Mike and Mary who helped the old man several days ago.

A. was B. are C. were D. had been

Answer 1

【答案】A

【解析】考查强调句式。强调句式由“It is/was +被强调成分+that/who…”构成。由于句中的动作是发生在过去，故选A。