【題目】 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（反應(yīng)）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 (水龍頭).【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 (細(xì)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.

【答案】

【1】F

【2】D

【3】B

【4】G

【5】A

【解析】

這是一篇說(shuō)明文。文章介紹了隔夜剩余的杯子里的水，水龍頭里的水和經(jīng)長(zhǎng)時(shí)暴曬的瓶裝水是否能夠再引用。

【1】根據(jù)上文的Sometimes, you do not finish drinking your glass of water before you go to bed. 有時(shí)，你沒(méi)有喝完你的一杯水之前，你上床睡覺(jué)。和下文的But have you ever wondered if it is still safe to drink? 但是你有沒(méi)有想過(guò)它是否仍然可以安全飲用?可知，選項(xiàng)F“你可能想第二天早上再喝�！迸c 上下文銜接最好。故選F。

【2】結(jié)合上文語(yǔ)境及下文的That’s because after about 12 hours, the carbon dioxide (二氧化碳) in the air reacts（反應(yīng)）with the water in your glass, slightly lowering its pH level.可知，杯子里的水在剩余長(zhǎng)時(shí)間后，水會(huì)變質(zhì)，故選項(xiàng)D“但是你可能會(huì)發(fā)現(xiàn)它嘗起來(lái)很奇怪”最合下文語(yǔ)境。故選D。

【3】根據(jù)上文These microorganisms can stay on your glass. 這些微生物可以留在你的玻璃上�？芍�，選項(xiàng)B“它們會(huì)讓你更容易生病”與上文最銜接。故選B。

【4】根據(jù)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. 美國(guó)西弗吉尼亞大學(xué)的贊恩·薩特菲爾德說(shuō)，大多數(shù)專家認(rèn)為自來(lái)水的保質(zhì)期為6個(gè)月�？芍�，選項(xiàng)“這是可以的，但是，自來(lái)水不能長(zhǎng)期儲(chǔ)存�！迸c下文最銜接。故選G。

【5】本段主要介紹的是瓶裝水存放在太陽(yáng)底下或者車?yán)锖荛L(zhǎng)一段時(shí)間，塑料就會(huì)產(chǎn)生一種叫做BPA的化學(xué)物質(zhì)。這種化學(xué)物質(zhì)會(huì)導(dǎo)致心臟病和癌癥。由此可知，選項(xiàng)A“塑料水瓶呢?”是最佳主題句。故選A。

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