Question

【题目】 Sometimes, you do not finish drinking your glass of water before you go to bed. 【1】

But have you ever wondered if it is still safe to drink?

“If you have clean water in a clean glass, you’re fine to drink it for a day or two,” Kellogg Schwab from the Johns Hopkins University Water Institute in the US told Time.

【2】 That’s because after about 12 hours, the carbon dioxide (二氧化碳) in the air reacts（反应）with the water in your glass, slightly lowering its pH level.

Also, there might be more microorganisms (微生物) in your water if you leave it out overnight. Microorganisms grow more quickly at room temperature. These microorganisms can stay on your glass. 【3】 But as long as you clean your glasses very often, this will not be a problem.

In countries like the US and UK, people often drink water directly from the tap (水龙头).【4】 Most experts say that tap water has a shelf life of six months, according to Zane Satterfield from West Virginia University, US. After six months, there is less chlorine (氯) in the water and bacteria (细菌) start to grow. You’d better not drink the water otherwise you may get sick.

【5】 Schwab said people should be careful with them. If you leave a bottle of water under the sun or in a car for a long period of time, the plastic produces a chemical called BPA. This chemical can cause heart disease and cancer.

A.What about plastic water bottles?

B.They can make you get sick more easily.

C.Is it safe for you to drink the water later?

D.But you may find that it tastes strange.

E.Some people prefer to drink water from rivers.

F.You might want to drink it the next morning.

G.This is OK—however, tap water cannot be stored for a long time.

Answer 1

【答案】

【1】F

【2】D

【3】B

【4】G

【5】A

【解析】

这是一篇说明文。文章介绍了隔夜剩余的杯子里的水，水龙头里的水和经长时暴晒的瓶装水是否能够再引用。

【1】根据上文的Sometimes, you do not finish drinking your glass of water before you go to bed. 有时，你没有喝完你的一杯水之前，你上床睡觉。和下文的But have you ever wondered if it is still safe to drink? 但是你有没有想过它是否仍然可以安全饮用?可知，选项F“你可能想第二天早上再喝。”与 上下文衔接最好。故选F。

【2】结合上文语境及下文的That’s because after about 12 hours, the carbon dioxide (二氧化碳) in the air reacts（反应）with the water in your glass, slightly lowering its pH level.可知，杯子里的水在剩余长时间后，水会变质，故选项D“但是你可能会发现它尝起来很奇怪”最合下文语境。故选D。

【3】根据上文These microorganisms can stay on your glass. 这些微生物可以留在你的玻璃上。可知，选项B“它们会让你更容易生病”与上文最衔接。故选B。

【4】根据下文的Most experts say that tap water has a shelf life of six months, according to Zane Satterfield from West Virginia University, US. 美国西弗吉尼亚大学的赞恩·萨特菲尔德说，大多数专家认为自来水的保质期为6个月。可知，选项“这是可以的，但是，自来水不能长期储存。”与下文最衔接。故选G。

【5】本段主要介绍的是瓶装水存放在太阳底下或者车里很长一段时间，塑料就会产生一种叫做BPA的化学物质。这种化学物质会导致心脏病和癌症。由此可知，选项A“塑料水瓶呢?”是最佳主题句。故选A。