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  • 科目:英语
  • 题型:单选题
  • 难度:中等
  • 人气:1009

—I’m afraid the project may be several days behind schedule due to bad weather.
—Don’t worry. Three more assistants will be _______ in no time at all.

A.at your convenience B.at your command
C.at your risk D.at your request
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—I’m afraid the project may be