________ the rockets ing into being, the Space Age began, ________ China is sure to play an important role.A.As; whenB.With; at whichC.With; in whichD.As; while
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C解析第一个空后面不是句子,所以第一个空应构成with复合结构作状语,as后面应接句子;第二个空应引导定语从句修饰前面的the Space Age,从句中需要时间状语,所以应选in which表示“在太空时代”。