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For most of us, the rain that falls on our roof runs off into the ground or the sewer(下水道) system. But if you want to save a little water and reuse it on your lawns or plants --- or even use it for laundry, dishes, or other needs --- collecting rainwater from your gutter’s downspouts(檐槽的水落管) is a no-brainer.
According to John C. Davis, writing in E / The Environmental Magazine, just about any homeowner can collect rainwater, given that the roof and gutters do most of the work. And since an inch of rain falling on a 2,000-square-foot roof produces some 1,200 gallons of water, you can harvest enough to water your lawn or garden.
Plants and grass actually do better when fed rainwater instead of tap water, which is usually treated with substances that can hold back plant growth. Using rainwater can also extend the life of pipes, since the salts added to tap water may gradually damage the pipes. However, homeowners should set up a water purification system if they do plan to use rainwater for inside needs.
Rainwater harvesting can also be good for the local community, as it reduces the erosion, flooding, and pollution associated with heavy rainfall, and reduces dependence on public water supplies. So some states fund rainwater collection systems in their local communities.
Many varieties of rain barrel(桶) systems, starting at just $100, are available for home use. A typical setup is simply a rain barrel positioned under a gutter’s downspout. Skillful homeowners can make their own water harvesting systems, but buying one is a lot easier. Most garden centres offer a range of choices as well as tips.
【小题1】The underlined word “no-brainer” in Para. 1 probably means something that ______.

A.is hard to deal with B.is very easy
C.is of no real value D.deserves more attention
【小题2】From Paragraphs 3 and 4, we can learn _______.
A.how to set up a water harvesting system
B.how a rain barrel system works
C.some advice on saving tap water
D.the benefits of using rainwater
【小题3】What is the topic of the passage ?
A.Basic gardening skills. B.Water-saving techniques.
C.Wastewater treatment systems. D.Roof rainwater collection.


【小题1】B
【小题2】D
【小题3】D

解析试题分析:本文主要介绍了收集并利用雨水的可行性以及收集雨水的方法和好处。比如利用雨水灌溉草坪,植物;使用雨水可以延长管道寿命;可以有效减少因暴雨而造成的洪涝灾害,而且还可以减少人们对公共供水的依赖。
【小题1】词意猜测题。从常识可以判断从房檐落水管里收集雨水是非常简单的事情,而且下文just about any homeowner can collect rainwater,也是很好的一个提示,所以正确选项是B。
【小题2】主旨大意题。第三四段是讲述利用雨水可以灌溉植物草坪,可以延长管道寿命,对当地社区也有好处,可以减少因暴雨而造成的洪涝,所以判断D选项正确。
【小题3】主旨大意题。文章第一段提出收集雨水很方便collecting rainwater from your gutter’s downspouts is a no-brainer.第二段是说雨水收集的可行性,第三四段是介绍利用雨水的好处,最后是讲如果收集雨水。文章中心话题是雨水的收集,所以D选项正确。
考点:考查日常生活类短文阅读。

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