2. 外语
  3. I switched off the lights ____________ (离开房间之前).

I switched off the lights ____________ (离开房间之前).

admin2010-03-26  49
问题 I switched off the lights ____________ (离开房间之前).
选项
答案before I left the room/before leaving the room
解析
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大学英语四级

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