______ rockets had been used sporadically for several hundred years, they remained a relat
______ rockets had been used sporadically for several hundred years, they remained a relatively minor artifact of civilization until the twentieth century.
A.Despite
B.In spite of
C.In spite the fact that
D.Despite the fact that
请帮忙给出正确答案和分析,谢谢!
参考答案
您可能感兴趣的试题
【C10】______A.had votedB.had been votingC.have votedD.were voting