A. imaginatively B. recently C. carefully D. unscientifically E. accidentally F. satisfactorily Man did not succeed in making r

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问题 A. imaginatively
B. recently
C. carefully
D. unscientifically
E. accidentally
F. satisfactorily
Man did not succeed in making rain until quite______.

选项

答案B

解析 由文章第四段可知,Schaefer是在二战以后才开始研究人工降雨;又由最后一段可知,他创历史地成功进行了人工降雨。由此可知,人类直到最近才成功进行人工降雨,故选B。
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