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    19．Our industry makes use of what farmers          throw away as waste．（　　）
    A．alsoB．thoughC．otherwiseD．therefore

    分析 我们企业利用的正是农民当作废物扔掉的东西．

    解答 答案：C  句意表达的是对比，make use of利用，throw away as waste废弃不用；选项中只有otherwise可以表达相反，不同的含义．故选C．

    点评 并列连词用来连接并列句．常用的并列连词有：表并列关系的and，neither…nor．，either…or…，as well as，not only…but also…；表转折关系的but，yet，however，still，while；表选择关系的either…or…，neither…nor…，or，otherwise；表因果关系的for，therefore，so，学习时要加以区分和掌握．

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