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    Dr.Jack Todd is very interested in clean water .__小题1:_,so it's natural that he is to developer of a small and affordable system(系统）to clean waste water, His “Living  Machine" can clean wastewater in your home or in your business.
    __小题2:_ The wastewater goes into a big plastic tank where bacteria(细菌）start to break down the waste.A few days later after it is dealt with, the water is brought into a greenhouse filled with plants and fish.With the help of sunlight, the plants and animals remove more chemicals from the water,making it cleaner,Then the water can be reused for washing or bathing _小题3:__ but the water is clean enough for watering the flowing, washing the dog, or even for bathing or swimming.
    The advantage of this technology is that it is affordable and good for the environment. __小题4:__. It can help to use less fresh water, and it can help keep the water supply unpolluted.
    A.    If enough homes and businesses use “Living Machines”
    B.     People like to plant trees around their houses
    C.     He is also interested in saving money
    D.    It cannot be used for drinking or cooking
    E.     The “Living Machine” is a system for cleaning wastewater
     

    小题1:C
    小题2:E
    小题3:D
    小题4:A

    试题分析：“Living  Machine"是Jack发明的一台净水设备，通过它净化后的水可以用来洗衣服，洗澡。
    小题1:根据下文so it's natural that he is to developer of a small and affordable system(系统）to clean waste water可知Jack准备发明一个小而实惠的净水设备故选C，对省钱非常感兴趣。
    小题2:根据下文The wastewater goes into a big plastic tank where bacteria(细菌）start to break down the waste.可知这个发明的工作原理，故应介绍它是做什么用的，故选E。
    小题3:根据上下文的理解此句介绍的是净化后的水的用途，有选择项的提示可知选择D，这个水不用用来饮用。
    小题4:根据语境可知此部分介绍使用Living Machine”的意义，故选A。
    点评：对于此类题型的解答，可以将整个文段首先浏览一遍，大概理解意思。答题过程中，根据所提供的答语或是后文进行作答，同时，做题过程中也可以使用排除法，将选项带到文章中逐一的作答，答完后注意通读检查是否符合逻辑，语义顺畅。
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