C. It is better for the local communities to restrict ecotourism activities.

　　D. The government should take some measures and some policies should be made to protect the biodiversity though more resources were being used for it.

　　5. What is the best title for the passage?

　　A. Animals at risk

　　B. Global warming and its consequences

　　C. Solutions to animal extinction

　　D. Animals at risk due to climate change

　　Ⅲ. 阅读第二节

　　下面文章中有5处(第1~5题)需要添加小标题。请从以下选项(A、B、C、D、E和F)中选出符合各段意思的小标题。选项中有一项是多余选项。

　　A. A careful analysis biologically

　　B. What is global warming

　　C. Solution to the terrifying result

　　D. Greater danger of extinction

　　E. Many shocking things were found

　　F. A shocking report

　　1. 　 

　　The earth is getting warmer. People burn coal, oil and gas and this produces carbon dioxide, methane(沼气)and nitrous oxide. These gases, called “greenhouse gases” , prevent the heat of the sun from leaving the earth’s upper atmosphere and this makes the earth warmer.

　　2. 　 

　　A few weeks ago a group of scientists produced a report about global warming and the natural world. They wanted to find out if global warming was dangerous for plants and animals. According to what they found, the scientists say that during the next 50 years about 25% of land animals and plants will become extinct. More than a million plant and animal species will be extinct by 2050.

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