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    精英家教网 > 高中英语 > 题目详情
    Chinese scientists have produced an embryo of a giant panda through cloning technology,_____ is a breakthrough ______ could save the endangered animals.
    A．that; whichB．which; thatC．which; whatD．that; what
    B

    试题分析： 句意：科学家已经通过克隆技术复制出大熊猫的胚胎，这是能够拯救濒危动物的一项突破。第一空填which，引导非限制性定语从句，指代前面的内容，that不能引导非限制性定语从句，第二空填that修饰breakthrough，在定语从句中做主语，所以选B。
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