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—BeiDou Navigation Satellites(北斗卫星导航) _____ around 9:46 Tuesday were successfully sent up from Xicha...
题目内容：
—BeiDou Navigation Satellites(北斗卫星导航) _____ around 9:46 Tuesday were successfully sent up from Xichang on Long March 3Bs ______ June 23, 2020.
—Really? I am proud of our country.
A.on; on B.at; on C.on; in D.at; in
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