2. 考研
  3. A. like B. through C. consists of A. what substances your tap water【T1】______ B. while the water streams【T2】______ pipel

A. like B. through C. consists of A. what substances your tap water【T1】______ B. while the water streams【T2】______ pipel

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问题 A. like     B. through     C. consists of
A. what substances your tap water【T1】______
B. while the water streams【T2】______ pipelines
C.【T3】______ every other substance
    Drinking water,【T4】______ , contains small amounts of bacteria. Most of these bacteria are common ones and they are generally not harmful. Chlorine(氯)is usually added to drinking water to prevent bacterial growth【T5】______ This is why drinking water also contains small amount of chlorine.
    Water mostly consists of minerals and other inorganic compounds, such as calcium. If you want to find out【T6】______ and whether it is totally safe to drink, you can have a specialized agency check it out for you.
【T2】
选项 A、 
B、 
C、 
答案B
解析 while the water streams——pipeline是一个while引导的分句，streams做谓语动词，含义是“流动”，pipeline“管道”，因此填入介词through(通过)最符合语义和语法的要求。
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