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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 2147

"Mary, turn off the water_________you are brushing your teeth. "  "Sorry, I'll do it at once. "
A. until          B. while          C. during

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Mary,turnoffthewateryouarebrus