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  • 科目:英语
  • 题型:单选题
  • 难度:较易
  • 人气:1543

---So you were in the supermarket __________ you heard a strange sound, right?
---That’s true. I ran out as quickly as possible. 

A.when B.while C.then D.which
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Soyouwereinthesupermarketyouhe