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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1977

There were few doctors, _____ he had to work very hard _____ his own.

A.and; in B.because; at C.so; on D.when; for
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Therewerefewdoctors,hehadtowor