1. draw the outline 画出轮廓

2. be stuck onto the card 被粘到卡片上

3. lay out 铺开，铺放

4. dip into 蘸，浸入

5. cut out 裁剪出

6. have a go at试一试

try out 试验

阅读下列四篇短文，从每小题后所给的A,B,C或D四个选项中，选出最佳选项。

We already know the fastest, least expensive way to slow climate change:　Use less energy. With a little effort, and not much money, most of us could reduce our energy diets by 25 percent or more-doing the Earth a favor while also helping our wallets.

Not long ago, my wife, PJ, and I tried a new diet-not to lose a little weight but to answer an annoying question about climate change. Scientists have reported recently that the world is heating up even faster than predicted only a few years ago, and that the consequences could be severe if we don't keep reducing emissions(排放) of carbon dioxide(CO2) and other greenhouse gases that are trapping heat in our atmosphere.

We decided to try an experiment. For one month we recorded our personal emissions of CO2. We wanted to see how much we could cut back, so we went on a strict diet. The average US household(家庭) produces about 150 pounds of CO2 a day by doing common-place things like turning on air-conditioning or driving cars. That's more than twice the European average and almost five times the global average, mostly because Americans drive more and have bigger houses. But how much should we try to reduce?

For an answer, I checked with Tim Flannery, author of The Weather Makers:　 How Man Is Changing the Climate and What It Means for Life on Earth. In his book, he had challenged readers to make deep cuts in personal emissions to keep the world from reaching extremely important tipping points, such as the melting(融化) of the ice sheets in Greenland or West Antarctica. "To