题型：完形填空 题类：常考题 难易度：普通
牛津上海(本地版)五四制初中英语八年级上册Module 1 Unit 1 PenfriendsUnit 1 单元测试卷（含小段音频）
Saving the environment is actually quite simple, when you come to think about it. It does not have to be a problem. If you and everyone follow these tips, you are helping save the environment easily.
Switch off the lights when you leave the room. By now you have probably wasted thousands of watts (瓦特) lightening your room 1 you weren't there. If you work on a home office, this habit is not only bad for the environment, but also for your pocket.
Turn off the computer when possible. If you know that you will be 2 for four hours or more, turning it off could lead to large savings over the long run.
Print only when necessary. Sure, reading on paper might be more comfortable, but you should avoid printing those two-line e-mails every time. Read it on the screen and print only necessary documents. Remember also to use 3 sides of the sheet.
Use fluorescent lamps (荧光灯). The fluorescent lamps may 4 more in the stores, but within the time you use one, you should have already recovered the investment. A normal incandescent light bulb (白炽灯泡) lasts 750 hours but a fluorescent bulb will give off the same amount of light yet last for 7,500 to 10, 000 hours with 1/3 of the wattage.
Use low-flush (冲洗) toilets. In your household, 40% of the pure water is flushed down the toilet. You can 5 this easy way at home; use small plastic bottles, filled with water or stones to displace (置换) the amount of water in toilets. This will make it a "low-flush toilet", or you can use a displacement bag in your tank, which might reduce 1-2 gallons per flush.
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