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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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—I am sure Mary will win the first prize in the final.
—I think so. She______ for it for months.

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