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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:791

Welcome to the Ice Bucket Challenge. The challenge is simple: when        , one either pours a bucket of icy water over his or her head or donates $100 to the ALS Association.

A.to challenge B.challenged
C.you challenged D.having challenged
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WelcometotheIceBucketChallenge