A
Global warming, greenhouse gases, destruction of forests, pollution of oceans, air and land are all harming the environment that wild animals depend on to live.
What is happening to wild animals?
Many wild animals today are endangered or facing dying out as they struggle to adapt (适应) to the changing environment. Changes in the environment are not something new. The environment has been changing for millions of years and many wild animals have adapted to the changes, but now the changes are happening too quickly for them to adapt to and they are in danger of dying out completely. Sometimes the protection of animals has come too late and many wild animals have become rare or have moved away because of the damage by humans.
Why should we care?
If all the forests were cleared and the oceans and air were polluted, the balance of nature would be destroyed and the Earth would not be able to support any life. Humans as well as animals would not survive. It is in our own interest to care about the environment and protect it.
What is being done to protect wild animals?
The best way to save endangered animals is to provide safe places for them to live in. In many countries it is now illegal to hunt endangered animals or sell products made from their bodies. Many countries have set up protected areas called wildlife reserves where animals can live and increase in number. Many areas in Africa have been made into wildlife parks to save the amazing wild animals that live there.
Now many wild animals are being fed in zoos and then successfully put back into these areas. To help animals survive is important; we can understand how animals live in the wild and the importance of the environments where they live.
文章大意：本文是一篇说明文。由于人类活动而造成的环境的改变使很多野生动物濒临灭绝，那我们应该怎样保护野生动物呢？
21．Which of the following is NOT the cause of wild animals’ dying out？__C__
A．Global warming. B．Destruction of forests.
C．Natural disasters. D．Air pollution.
解析：细节理解题。从“Global warming, greenhouse gases, destruction of forests, pollution...”可判断出A、B、D三项均为造成野生动物灭绝的原因，只有C项未提到。
22．Which of the following is the effective measure to protect wild animals？__B__
A．Putting them in the zoo to be fed.
B．Letting them live in their reserves.
C．Not allowing them to be hunted.
D．Building wildlife parks in cities.
解析：细节理解题。根据第四段的“The best way to save endangered animals is to provide safe places for them to live in”可知选B。
23．Which of the following would be the best title of the text？__A__
A．The environment and wild animals
B．Why should we protect wild animals?
C．The importance of protecting animals
D．The endangered animals will disappear
解析：标题判断题。本文先讲人类加速了环境的变化使野生动物濒临灭绝，接着讲好的环境的重要性以及如何保护野生动物，故最好的标题是“环境与野生动物”。
