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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 1717

Completing all the homework by the dinner, John felt very tired. He __________all day long.

A.was studying B.studies C.has studied D.had been studying
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Completingallthehomeworkbythed