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Pollution of water supplies is usually due to poor health conditions close to
Pollution of water supplies is usually due to poor health conditions close to
游客
2023-10-10
25
管理
问题
Pollution of water supplies is usually due to poor health conditions close to water sources, sewage 【T1】______into the sources themselves, leakage of sewage into 【T2】______ systems or pollution with industrial or 【T3】______waste. Even if a piped water supply is safe at its source, it is not always safe by the time it reaches the tap. Intermittent tap water supplies should be 【T4】______as particularly suspect.
Travelers on short trips to areas with water supplies of uncertain 【T5】______should avoid drinking tap water, or 【T6】______water from any other source. It is best to drink hot drinks, bottled or canned drinks of well-known brand names—international 【T7】______ of water treatment are usually followed at bottling plants. Carbonated (含二氧化碳的) drinks are acidic (酸性的), and slightly safer. 【T8】______, and that their rims (边缘) are clean and dry.
Boiling is always a good way of treating water. 【T9】______. Portable boiling elements that can boil small quantities of water are useful when the right voltage (电压) of electricity is available. 【T10】______. [br] 【T4】
选项
答案
regarded
解析
根据空格前的should be可知此处应填入一个动词-ing、动词-ed或形容词,且该词能与as搭配使用。本段阐述的均是引起水污染的原因,而且上句中提到,管道供水系统在水源处是安全的,等水到达水龙头时就不一定总是安全的了。因此,此处想表达的是断断续续的自来水供应系统应该被视为是非常可疑的。因此,空格处所填单词应与be和as搭配表示“被视为……”。结合录音可知答案为regarded。
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