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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
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—Is it for two months ______ they have stayed here?
—No,it is only three weeks ______they arrived here.

A.that;since B.that;when C.when;that D.since;before
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—Isitfortwomonthstheyhavestaye