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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 851

At present  ________ of the experiments  ________done in labs after the new building has been finished.

A.four fifth; is B.four fifths; are
C.four fifth; are D.four fifths; is
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Atpresentoftheexperimentsdonei