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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:476

Once upon a time, a (n)__________ famous scientist said that life was not easy for any of us but first of all we should believe in ourselves.

A.another
B.sure
C.some
D.certain
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Onceuponatime,a(n)famousscient