China is the third country humans into Earth orbit after Russia and the U.S.A.to independently l
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
the third to do somthing///////分词作定语修饰country 也可以啊！请注意 the+ lst/second/third 之类 都是 to do 是固定结构