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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 779

---- Has Sam finished his homework today?
---- I have no idea. He ________ it this morning.

A.did B.has done C.was doing D.had done
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HasSamfinishedhishomeworktoday