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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1894

—May I speak to Mr.Smith?
—I am afraid not.He is at a meeting now.It's not ________.

A.reliable B.convenient
C.beneficial D.available
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—MayIspeaktoMr.Smith?—Iamafrai