練習:
1． According to the first two paragraphs，the author thinks that
A strong measures have been taken by the government to prevent global warming．
B to reduce carbon emissions is all impossible mission．
C despite the difficulty，scientists have some options to prevent global warming．
D actions suggested by scientists will never be realized．
2． Scientists resist talking about their options because they don't want people to
A know what they are doing．
B feel their efforts are useless．
C think the problem has been solved．
D see the real problem．
3． What does Stephen Schneider say about a heroin addict and methadone?
A Methadone is an effective way to treat a hard heroin addict．
B Methadone is not a correct way to treat a heroin addict．
C Hospitalization together with methadone can work effectively with a heroin addict．
D Methadone and heroin are equally effective in treating a heroin addict．
4． What is Stephen Schneider’s idea of preventing global warming?
A To ask governments to take stronger measures;
B To increase the sunlight reaching the Earth．
C To apply sunscreen to the Earth．
D To decrease greenhouse gases．
5． What is NOT true of the effectiveness of “sunscreen”，according to the last paragraph?
A It deflects sunlight reaching the Earth to counteract the warming．
B It blocks the incident energy in the sun’s rays．
C It is a controversial method．
D It decreases greenhouse gases in the atmosphere．
答案與題解：
1． C 短文第一段講了防止地球變暖是一項艱巨的任務，第二段說，盡管如此，科學家還是有一些辦法，所以C是正確選擇。A是錯誤選擇，因為作者認為政府和一些利益集團阻礙了科學家所倡導的行動的實施；B不是作者的觀點；D也不是正確選擇，因為第一段的最后一句“might not be implemented soon enough”并不表明永遠不能實現(xiàn)。
2． C 文章的第二段說，即使最糟糕的情況發(fā)生，科學家還是有幾招的。但他們不希望討論他們的招數(shù)，因為恐怕人們不再有危機感而削弱徹底解決問題的努力。所以C是正確選擇。
3． A 文章的第二段中，Stephen Schneider教授將自己解決地球變暖問題的辦法比作美沙酮，因為在癮君子拒絕正常住院治療時，服用美沙酮是一種緩解海洛因毒癮的有效方法。所以，A是正確的選擇。
4． C 文章最后一段的第一個句子提供的答案。
5． D 短文最后一段描述了“sunscreen”如何解決地球變暖問題。盡管有爭議，但是研究證明，“太陽屏”能反射和阻礙陽光，起到抵消由溫室效應引起的地球升溫。最后一段的第三和第四句是理解這個問題的關鍵。D不是文章所表達的內．容，所以是正確答案。
1． According to the first two paragraphs，the author thinks that
A strong measures have been taken by the government to prevent global warming．
B to reduce carbon emissions is all impossible mission．
C despite the difficulty，scientists have some options to prevent global warming．
D actions suggested by scientists will never be realized．
2． Scientists resist talking about their options because they don't want people to
A know what they are doing．
B feel their efforts are useless．
C think the problem has been solved．
D see the real problem．
3． What does Stephen Schneider say about a heroin addict and methadone?
A Methadone is an effective way to treat a hard heroin addict．
B Methadone is not a correct way to treat a heroin addict．
C Hospitalization together with methadone can work effectively with a heroin addict．
D Methadone and heroin are equally effective in treating a heroin addict．
4． What is Stephen Schneider’s idea of preventing global warming?
A To ask governments to take stronger measures;
B To increase the sunlight reaching the Earth．
C To apply sunscreen to the Earth．
D To decrease greenhouse gases．
5． What is NOT true of the effectiveness of “sunscreen”，according to the last paragraph?
A It deflects sunlight reaching the Earth to counteract the warming．
B It blocks the incident energy in the sun’s rays．
C It is a controversial method．
D It decreases greenhouse gases in the atmosphere．
答案與題解：
1． C 短文第一段講了防止地球變暖是一項艱巨的任務，第二段說，盡管如此，科學家還是有一些辦法，所以C是正確選擇。A是錯誤選擇，因為作者認為政府和一些利益集團阻礙了科學家所倡導的行動的實施；B不是作者的觀點；D也不是正確選擇，因為第一段的最后一句“might not be implemented soon enough”并不表明永遠不能實現(xiàn)。
2． C 文章的第二段說，即使最糟糕的情況發(fā)生，科學家還是有幾招的。但他們不希望討論他們的招數(shù)，因為恐怕人們不再有危機感而削弱徹底解決問題的努力。所以C是正確選擇。
3． A 文章的第二段中，Stephen Schneider教授將自己解決地球變暖問題的辦法比作美沙酮，因為在癮君子拒絕正常住院治療時，服用美沙酮是一種緩解海洛因毒癮的有效方法。所以，A是正確的選擇。
4． C 文章最后一段的第一個句子提供的答案。
5． D 短文最后一段描述了“sunscreen”如何解決地球變暖問題。盡管有爭議，但是研究證明，“太陽屏”能反射和阻礙陽光，起到抵消由溫室效應引起的地球升溫。最后一段的第三和第四句是理解這個問題的關鍵。D不是文章所表達的內．容，所以是正確答案。