单选题 It is impossible to say how it will take place, because it will happen ______, and it will not be a long process.
A. spontaneously B. consequently C. approximately D. principally

【正确答案】 A
【答案解析】[解析] A项“spontaneously自然的，本能的”符合题意。其他三项“B项consequently因此；C项approximately近似地；D项principally主要地”都不正确。本题空格处是说它将自然地发生。因此A项为正确答案。