Passage Three
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. [32]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. [34]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. [35]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.

Questions 32 to 35 are based on the passage you have just heard.
32. Why does the speaker compare the earth to a spaceship?
正確答案：A
解析：短文開篇便將地球比作了spaceship，然后說上面的空氣、水、土地資源都很有限，因此答案為A。根據選項可以預測信息點是地球與宇宙飛船之間的相似處。答案中的關鍵詞limited supply of air, water為文中原詞。
33. How fast does the planet Earth travel around the sun?
正確答案：C
解析：選項之間的差異只是數字不同，發音兩兩相似，因此可注意辨別錄音中出現的數字。此題本身并不難，因此提前瀏覽選項是十分重要的。
34. Why does the speaker advise us to use the earth resources wisely?
正確答案：D
解析：短文提到，這些資源必須謹慎使用，因為我們無法從別的地方買到新的空氣、水或土地。所以D正確。從選項關鍵詞可猜測題目和資源的減少有關，并且是問減少的原因。答案中的no... new在文中兩次提及，關鍵詞added也是文中原詞。
35. What message is the speaker trying to convey?
正確答案：B
解析：答案B是對文章最后一句的同義表達。句型與原文一致。選項均與環境有關。環境問題是學生非常熟悉的話題，可用常識來排除干擾項。一般環境問題是人類與自然的問題，所以A排除；C明顯不符合事實；D中用了eliminate（消滅）一詞，估計沒人會贊同這種說法。