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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1287

While typing, Helen has a habit of stopping ______ to give her long and flowing hair a smooth.
A  now and then     B.over and over     C.up and down    D.here and there

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Whiletyping,Helenhasahabitofst