单选题 Looking to help the environment? Consider the following simple ideas.
Turn off electrical devices when they're not being used.
Turning off, rather than leaving on stand-by, things like your TV and computer will save huge amounts of energy. With this, we can all help reduce the amount of carbon dioxide emitted into the earth's atmosphere, thereby reducing pollution and global warming.
Share your car.
Rather than traveling to work alone, why not arrange car-sharing with one or more of your friends or colleagues? To give you an example, if you drive a fashionable car, you will use more energy in a year than you would leaving your fridge open for seven years, or your TV on for thirty-two years! Imagine the savings if you shared your car with 2, 3 or even 4 other people!
Refuse junk mail.
While we all complain about how much junk mail we get, we very rarely do anything about it. The mail continues to go straight from our letter-boxes into the garbage bin-with 99% of it not even opened. What can you do about this? There are various websites where you can register to receive NO JUNK MAIL. As well as saving time, you'll also be doing a lot for the environment. Each year, 100 million trees are used to produce junk mail. 250,000 homes could be heated with one day's supply of junk mail.
There are many other everyday changes you can make to help the environment. They will cost you nothing, and many will actually save you money! Why not give it a try? We can all help, if we really want to.

单选题 By turning off a TV or computer that's not being used, you will save a lot of energy.
【正确答案】 A
【答案解析】[解析] 关闭不用的电视和电脑可以节约大量的能源。本句话和文章第一个小标题下的内容：切断你家中类似电视和电脑等电器的电源，不要让它们时刻处于待用状态，这样会节省大量能源。相一致。
单选题 Compared with fridge and TV, driving a car wastes a lot of energy.
【正确答案】 A
【答案解析】[解析] 和冰箱、电视相比，开车浪费很多能源。根据Share your car那一段中：当你驾驶着你的时髦小轿车时，你消耗的能源比打开冰箱门7年，或让电视一直开32年所耗的能源还要多。可以推断出作者是在暗示和冰箱、电视相比，开车浪费很多能源。
单选题 We shouldn't buy a car since it wastes so much energy.
【正确答案】 C
【答案解析】[解析] 因为汽车非常浪费能源，所以我们不应该买车。该文章中并未涉及这一内容。
单选题 99% junk mail is thrown into the garbage bin without being opened.
【正确答案】 A
【答案解析】[解析] 99%的垃圾信件没有被打开就被扔进了垃圾箱。根据Refuse junk mail那一段的第二句话：垃圾信件还是被我们从信箱中取出然后直接扔到垃圾箱，其中99%的信件甚至认未打开过 可以推断出本句话是正确的。
单选题 The only drawback of junk mail is that it wastes our time.
【正确答案】 B
【答案解析】[解析] 垃圾邮件的唯一缺陷就是它浪费了我们的时间。根据文章中第四段的最后两句话：这样在节省时间的同时，我们也为环保做出巨大贡献。每年都会有一亿棵树被砍伐来制造垃圾信件。可以得出本句话是错误的。
单选题 You have to spend a lot of money to protect our environment.
【正确答案】 B
【答案解析】[解析] 要保护环境，我们必须要花好多的钱。本句话和文章第后一段第二句话：这些改变其实不花费我们任何精力，其中许多还可以为我们省钱。相矛盾，因此是错误的。
单选题 Even if we want to make some changes to help the environment, we can do nothing.
【正确答案】 B
【答案解析】[解析] 即使我们想做些改变去帮助改善环境，我们也无能为力。根据文章最后一句话可以得知只要我们愿意去做，我们都可以做到，本句话和丈中内容矛盾，因此本句话是错误的。