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  • 科目:英语
  • 题型:单选题
  • 难度:较易
  • 人气:503

—I won't get good grades_______ I study hard.
—That's ______ everyone is trying his best to prepare for the exam.
A. until; why    B. unless; when  C. unless; why

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—IwontgetgoodgradesIstudyhard.