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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1217

Having checked the doors were closed, and ________all the lights were off, the boy opened the door to his bedroom

A.why
B.that
C.when
D.where
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Havingcheckedthedoorswereclose