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Many satellites have been sent ________ into space.

[  ]

Afor

Bout

Coff

Dup

答案:D
解析:

send up是“发射”的意思。Send for表示“派……去请……”;send out表示“发出”“发送(信号)”;send off表示“寄发(信件)”“发送(信息)”。


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