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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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201. Tom _____ into the house when no one     . 

A.slipped; was noticing B.had slipped; noticed
C.slipped; had noticed D.was slipping; noticed
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201.Tomintothehousewhennoone.A