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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1612

—Who do you think will get the first prize?
—Mary, of course. She ________ for the competition for months.

A.is preparing B.was preparing
C.had been preparing D.has been preparing
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—Whodoyouthinkwillgetthefirstp