【題目】Have you heard that the research he spent most of his time_______ perfect success?

A. on was a B. to be

C. being a D. on being

【答案】A

【解析】

試題分析：根據(jù)spend+時(shí)間+on sth表示在某事上花費(fèi)時(shí)間；根據(jù)語(yǔ)境可知用一般過(guò)去式；根據(jù)句意; 你有沒(méi)有聽(tīng)說(shuō)他把大部分時(shí)間花費(fèi)在研究上是一個(gè)完美的成功。根據(jù)句意故選A

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