A. in the future B. noxious C. demands D. intensified Phrases: A. Water problems【T13】______ will become more intense an

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问题 A. in the future    B. noxious    C. demands    D. intensified
Phrases:
A. Water problems【T13】______ will become more intense and more complex
B. and many of these will contain chemicals which are【T14】______
C. On the other hand, increasing【T15】______ for water will decrease substantially the amount of water available for diluting wastes
D. agriculture will have to be【T16】______
    【T17】______ Our increasing population will tremendously increase urban wastes, primarily sewage.【T18】______ Rapidly expanding industries which involve more and more complex chemical processes will produce larger volumes of liquid wastes, 【T19】______ To feed our rapidly expanding population,【T20】______ This will involve ever-increasing quantities of agricultural chemicals.
【T16】

选项 A、 
B、 
C、 
D、 

答案D

解析 intensified在这里作“加强"讲,意思是农业必须被加强,被动语态用过去分词,故选D。
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