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    The country has already sent up three unmanned spacecrafts. the most recent at the end of last March. A.has been launched B.having been launched C.being launched D.to be launched 【查看更多】

     

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

    A. has been launched   B. having been launched

    C .being launched      D. to be launched

     

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

    A. has been launched   B. having been launched

    C .being launched      D. to be launched

    查看答案和解析>>


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