Never before so highly successful in his attempts to forecast the weather accurately on a

问题补充：

Never before so highly successful in his attempts to forecast the weather accurately on a small scale．

A. man has been

B. man is

C. has man been

D. will be man

答案：

A. man has been

B. man is

(答案→)C. has man been

D. will be man

解析： 考查时态和倒装句型。never置于句首时句子要倒装。never before用于现在完成时，因此答案为C。