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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 661

.When she came out, Mary looked a bit tired because she _____the house.

A.cleaned B.was C.had cleaned D.had been cleaning
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相关知识点

.Whenshecameout,Marylookedabit