China is the third country humans into Earth orbit after Russia and the U.S.A.to independently lChina is the third country _____ humans into Earth orbit after Russia and the U.S.A.to independently launch B.having independently launched C.to be independently launched D.independently launching B为什么不行
问题描述：
China is the third country humans into Earth orbit after Russia and the U.S.A.to independently l
China is the third country _____ humans into Earth orbit after Russia and the U.S.
A.to independently launch B.having independently launched C.to be independently launched D.independently launching
B为什么不行
答