◎ 题干
A 78-year-old retired engineer has built a capsule hotel for Beijing’s “ant tribe”. Among the 6 volunteers to try out the apartments on April 3____ Sun Changyun, a college student from Shenyang.
A.were B.are C.was D.is
◎ 答案
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◎ 解析
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◎ 知识点
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