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

分析 我們企業(yè)利用的正是農(nóng)民當作廢物扔掉的東西．

解答 答案：C  句意表達的是對比，make use of利用，throw away as waste廢棄不用；選項中只有otherwise可以表達相反，不同的含義．故選C．

點評 并列連詞用來連接并列句．常用的并列連詞有：表并列關系的and，neither…nor．，either…or…，as well as，not only…but also…；表轉折關系的but，yet，however，still，while；表選擇關系的either…or…，neither…nor…，or，otherwise；表因果關系的for，therefore，so，學習時要加以區(qū)分和掌握．

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