2. 外语
  3. Never before______so highly successful in his attempts to modify the weather on a very small scale.

Never before______so highly successful in his attempts to modify the weather on a very small scale.

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问题 Never before______so highly successful in his attempts to modify the weather on a very small scale.
选项 A、man has been
B、man is
C、has man been
D、will be man
答案C
解析 本题考查的是语法中的倒装现象。因为有表示否定意义的词never位于句首，所以后面需要用倒装结构，再者，此处需要用现在完成时，故选项C)为正确答案。该句意思为“在小范围内改变天气状况方面，人类从未像现在如此成功过”。
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