A、Nature has changed our environment over the years. B、We must avoid wasting resources and polluting our environment. C、Our reso

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问题  
In a way, all of us are on a spaceship—the planet Earth. [33]We move around the sun at 18 miles per second and never stop. On our spaceship, we have 5 billion people and limited supply of air, water and land. These supplies have to be used carefully because we can’t buy new air, water or land from anywhere else. Environment on our planet is a closed system. Nothing new is ever added. Nature recycles its resources. Water, for example, evaporates and rises at visible drops to form clouds. The same water returns to the earth as rain or snow. The rain that falls today is actually the same water that fell on the land 70 million years ago. Today, the earth is in trouble. Factories pour dirty water into rivers, many fish die and water becomes unhealthy for people to drink. Cars and factories put poisons into the air and cause plants, animals and people to get sick. People throw bottles and paper out of their car windows and roadside becomes covered with all sorts of wastes. Over the years people have changed environment and we have pollution. To continue to survive, we must learn how to use the earth resources wisely. We have to change our habits and stop dropping such enormous amounts of industrial waste into the water and air. [35]We must cooperate with nature and learn better ways to use, not to abuse our environment.
32. Why does the speaker compare the earth to a spaceship?
33. How fast does the planet Earth travel around the sun?
34. Why does the speaker advise us to use the earth resources wisely?
35. What message is the speaker trying to convey?

选项 A、Nature has changed our environment over the years.
B、We must avoid wasting resources and polluting our environment.
C、Our resources are nearly used up.
D、Trips to other planets will help eliminate pollution.

答案B

解析 答案B是对文章最后一句的同义表达。句型与原文一致。选项均与环境有关。环境问题是学生非常熟悉的话题,可用常识来排除干扰项。一般环境问题是人类与自然的问题,所以A排除:C明显不符合事实;D中用了eliminate(消灭)一词,估计没人会赞同这种说法。
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