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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 811

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The house caught ______ fire while they were away. It must have been set ______ on fire by someone.

A.a; a B.a; / C./; a D./;/
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.Thehousecaughtfirewhiletheywe