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  • 科目:英语
  • 题型:单选题
  • 难度:较易
  • 人气:1249
题文

– You must have your work done within 2 days.
-- Finishing a task in such short time is a (an) __________.

A.conclusion B.challenge C.explanation D.approach
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–Youmusthaveyourworkdonewithin