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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较难
  • 浏览 1237

---Has Tom finished his homework?
---I don’t know.  But he _________ it the whole morning.

A.did B.does C. was doing D. is doing
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HasTomfinishedhishomework?Idon