题目

A recent study has ________ an unexpected conclusion that the African elephant should be divided into two different species. A．kept up with  B．made up with C．caught up with  D．come up with 答案：　D　[考查动词短语辨析。句意：最近的一项研究得出一个意外结论，非洲象应被分成两个不同种类。keep up with“跟上”；make up with“和好”；catch up with“追上”；come up with “提出”。D项符合句意。]

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