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  3. Our environment is getting worse and worse with the increase of the world population, which affects the environment in two ways.

Our environment is getting worse and worse with the increase of the world population, which affects the environment in two ways.

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问题     Our environment is getting worse and worse with the increase of the world population, which affects the environment in two ways. Firstly, the limited energy resources will be used up much faster. Secondly, the increasing population creates more pollution, another severe problem that needs to be solved. Both problems are long-term ones because actions taken now show their results slowly over many years. They are also urgent because delays in action can lead to great suffering and social problems. The question seems to be difficult to handle for most people. However, a person can be a protector of environment in everyday life if he takes actions to save the environment right now. With the development of technology, cars make transportation easier and quicker than before, but we can’t ignore the disadvantages brought to us by more and more cars in use. For example, we are consuming gasoline, which is a non-renewable resource, and will soon be gone. Moreover, the exhausted gas from cars pollutes our air, and our health is therefore threatened by air pollution, which has a big potential effect on our daily life. So we can consider walking, taking buses, carpooling instead of driving cars alone. This seems to be a very slow process that can’t be so effective if it’s taken by a single person. But when more and more people become aware of the importance and positively take it as their personal responsibilities, the condition of the air will be improved to great extent.
The author’s main purpose in writing this passage is most probably to ______.
选项 A、complain about people’s slow actions to protect the environment
B、advise people to take actions to protect the environment
C、show himself to be an active environment protector
D、point out the bad effects of technologies in protecting environment
答案B
解析 本题测试对文章写作目的的理解。这要从通篇来看，选项A、C文中没有提及；选项D在文中虽然提及，但不是作者写此文的主要用意。告诫人们行动起来保护环境才是作者写此篇文章的真正意图所在，这在最后一句话中体现得特别清楚，因此选项B．advise people to take actions to protect the environment是本题的正确答案。
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