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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1239

The real reason why prices ____ , and still are, too high is complex, and no short discussion can satisfactorily explain this problem.

A.were B.will be
C.have been D.had been
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Therealreasonwhyprices,andstil