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Why______ you do everything as if you have to win?
A.mustB.canC.needD.shall
A

试题分析:考查情态动词:A. must必须,偏要,B. can能够,C. need需要,D. shall应该,可以,句意:你为什么做什么事情都好像你必须要赢?选A。
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