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  • 更新 2022-09-04
  • 科目 英语
  • 题型 选择题
  • 难度 中等
  • 浏览 65

The doctor was busy ______on the woman at that time.(  )

A.

operate

B.

operating

C.

to operate

D.

operated

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Thedoctorwasbusyonthewomanatth