2．Bottled water has become the choice for people who are healthy and thirsty．Bottled water is all over the world．But some say the planet's health，and people's health may be suffering from it．
The idea that bottled water is safer for humans may not be true．The Natural Resources Defense Council of America said，"There is no promise that because water comes out of a bottle，it is cleaner or safer than water from the tap．"Another New York City-based action group added that some bottled water is"really just tap water in a bottle-sometimes more clean，sometimes not．"
It is not proven that bottled water is better than tap water．Nick Reeves from the Chartered Institution of Water and Environmental Management said，"The high mineral content （含量） of some bottled water makes them not good for feeding babies and young children．"Also，most bottled water doesn't have fluoride （氟化物），which can make teeth stronger．Kids are drinking more bottled water and less fluoridated tap water，and some say that's behind the recent rise in bad teeth．
Storing is another problem．Placed near heat，the plastic bottles can produce bad chemicals （化学物质） into the water．
According to the Environmental Protection Agency，some 2.7 million tons of plastic are used worldwide to bottle water each year．The plastic can take between 400 and 1，000 years to break down．
In terms of energy use，plastic bottles are also not cheap．One report said that if water and soft drink bottlers had used 10 percent recycled materials in their plastic bottles，they would have saved about 72 million gallons of gas．
So，if you are worried about the effect of bottled water on the Earth，you can take the following steps．
●Drink from your tap．Unless your government warns against this，it should be fine．
●Get a container （容器）．Carry your tap water in a steel or a lined drinking container，and clean it between uses．
●Keep it cool．Don't drink from a bottle that has been sitting in the sun，don't store it near chemicals，and don't reuse plastic bottles．
●Choose glass containers over plastic if possible．When finished，recycle!
48．What is the main idea of the article？D
A．Drinking tap water is the only choice for people．
B．Glass containers are better than plastic bottles．
C．Plastic bottles are harmful to the environment．
D．Bottled water may not be as good as we think．
49．What can we learn about plastic bottles from the article？C
A．They break down in less than 300 years．
B．They can be used for many other things．
C．They are a risk to the environment．
D．They are cheap to make．
50．According to the article，we can know that bottled water isB
A．no problem for the environment
B．more expensive than tap water
C．always safer than tap water
D．better for babies
51．Which of the following about tap water is NOT mentioned in the article？A
A．There are a lot of problems storing tap water．
B．Bottled water can be just tap water in a bottle．
C．It may be better for your teeth．
D．It may contain fluoride．
分析 本文所以说明文阅读，作者通过这篇文章向我们主要讲述了如今全世界都在使用瓶装水，但是瓶装水给我们来了方便的同时，也给我们健康和地球的环境带来了许多的问题．
解答 48．D 主旨大意题．文章主要讲述瓶装水所给地球带来的各种环境上的问题，瓶装水并非我们所想象得那么的好，故选D．
49．C 细节理解题．根据文章第五段According to the Environmental Protection Agency，some 2.7 million tons of plastic are used worldwide to bottle water each year．The plastic can take between 400 and 1，000 years to break down．可知塑料瓶对环境有害．故选C．
50．B 细节理解题．根据文章第六段In terms of energy use，plastic bottles are also not cheap．可知瓶装水并不便宜．故选B．
51．A 细节理解题．根据文章倒数几段可知自来水的好处，B、C、D符合文章的叙述，而文中并没有提到自来水储存的问题，故选A．
点评 考查学生的细节理解和推理判断能力．做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确选择．在做推理判断题时不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．
