题目内容
阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
In the past, human activities 1. (have) little effect on global warming, but now they have caused the rise of the earth temperature. All scientists agree that the increase in the temperature results 2. the burning of fossil fuels. One of some byproducts 3. (call) greenhouse gases is carbon dioxide which can trap more heat energy in the atmosphere.
Over the last 100 years, the temperature of the earth 4. (increase). The 5. (attitude) towards this rise are completely different. Some are positive 6. others are negative. Those who are positive think that without the greenhouse gases the earth would be 7. (cool) than it is, 8. would not be suitable to live on. Others think the rise of the earth temperature may cause severe storms, floods, droughts and so on.
9. (actual), green house gases will continue to build up in the atmosphere. Luckily, we human beings are doing what we can 10. (reduce) green house gases. More importantly, individuals can make a difference.