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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1152

China began to open to the outside world in the late 1970s._________, there have been great changes in the country.

A.By then B.As a result
C.At last D.In all
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Chinabegantoopentotheoutsidewo