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  • 科目:英语
  • 题型:单选题
  • 难度:较易
  • 人气:236
题文

—How long will it be ________ the 30th Olympic Games is held in London?
—It won’t be two years, I think.

A.when B.that C.before D.since
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—Howlongwillitbethe30thOlympic