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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1680

After describing the planned improvements, she went on _____ how much they would cost.

A.to explain B.explaining
C.to be explaining D.having explained
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Afterdescribingtheplannedimpro