A.like B.through C.consists of A.what substances your tap water【T1】______ B.while the water streams【T2】______pipelines C.【T3

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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.
【T5】

选项

答案B

解析 此处不需要名词性成分,因此A选项(名词性从句)不能选。句子的大意是:氯经常被添加到水中,在水流经管道时,来抑制细菌的增加。因此,B为正确答案。
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