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The doctor spent nine hours on the eye of the wounded soldier.A.to operateB.operatingC.in operatingD

编辑:chaxungu时间:2026-04-24 12:49:00分类:高中英语题库

The doctor spent nine hours ________ on the eye of the wounded soldier.
A.to operateB.operatingC.in operatingD.both B and C在线课程B