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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较难
  • 浏览 343

The country has already sent up 3 unmanned spacecraft, the most recent        at the end of last March.

A.was launched B.being launched
C.has been launched D.having been launched
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Thecountryhasalreadysentup3unm