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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

C


解析:

(考查時態(tài)和倒裝句型。never置于句首時句子要倒裝。never before用于現(xiàn)在完成時,因此答案為C。)

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