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    精英家教网 > 高中英语 > 题目详情
    A professor of biology gave a talk to more than 1000 students on elephants living conditions and the dangers _______ them. 
    A．faceB．facingC．facedD．are facing
    B
    考查非谓语动词。facing them作定语，修饰living conditions and the dangers，故选B。
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