閱讀下面的短文。每篇短文的后面有五個問題，每個問題有四個備選答案。請根據短文的內容選擇最佳答案。每個試題計3分,共計15分。

　　Even with the best will1 in the world，reducing our carbon emissions is not going to prevent global warming.It has become clear that even if we take the most strong measures to control emissions，the uncertainties in our climate models still leaye open the possibility of extreme warming and rises in sea level.At the same time，resistance by governments and special interest groups makes it quite possible that the actions suggested by climate scientists might not be implemented soon enough.

　　Basically the idea is to apply sunscreen to the whole planet.One astronomer has come up with a radical plan to cool Earth;launch trillions of feather-light discs into space，where they would form a vast cloud that would block the suns rays.Its controversial，but recent studies suggest there are ways to deflect just enough of the sunlight reaching the Earths surface to counteract the warming produced by the greenhouse effect.Global climate models show that blocking just 1.8 per cent of the incident energy in the suns rays would cancel out the warming effects produced by a doubling of greenhouse gases in the atmosphere. That could be crucial，because even the most severe emissions-control measures being proposed would leave us with a doubling of carbon dioxide by the end of this century，and that would last for at least a century more.

　　emissionn.發射，發射物 heroinn.海洛因

　　n.住院治療

　　geoengineering n.地質工程 astronomern.天文學家

　　百萬兆; 萬億，兆

　　adj.有爭議的

　　注釋：

　　2. if the worst comes to theworst：如果最最糟糕的事情發生了。這是英式英語的用法，在美式英語中它說成if worst comes to worst。在不同的語境中，有不同的澤法，如：If the worst comes to the worst，Becky thought，my retreatsecure;and l have the right- hand seat inthe barouche.蓓墓想道：逼到最后一條路，逃難是不怕的了，在他的大馬車里，我穩穩地有一個位子了。又如：Ifthe worst comes to the worst，well sell the car.大不了我們把車賣了。

　　4. methadone：美沙酮，一種有效的合成麻醉藥，它不像口馬啡或海洛因那樣容易汁人上癮，在戒毒治療中被用作這些毒品的替代品。

　　1. According to the first two paragraphs，the author thinks that

　　B to reduce carbon emissions is all impossible mission.

　　D actions suggested by scientists will never be realized.

　　A know what they are doing.

　　C think the problem has been solved.

　　3. What does Stephen Schneider say about a heroin addict and methadone?

　　B Methadone is not a correct way to treat a heroin addict.

　　D Methadone and heroin are equally effective in treating a heroin addict.

　　A To ask governments to take stronger measures;

　　C To apply sunscreen to the Earth.

　　5. What is NOT true of the effectiveness of sunscreen，according to the last paragraph?

　　B It blocks the incident energy in the suns rays.

　　D It decreases greenhouse gases in the atmosphere.

　　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。

　　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。

　　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。

　　閱讀下面的短文。每篇短文的后面有五個問題，每個問題有四個備選答案。請根據短文的內容選擇最佳答案。每個試題計3分,共計15分。

　　Even with the best will1 in the world，reducing our carbon emissions is not going to prevent global warming.It has become clear that even if we take the most strong measures to control emissions，the uncertainties in our climate models still leaye open the possibility of extreme warming and rises in sea level.At the same time，resistance by governments and special interest groups makes it quite possible that the actions suggested by climate scientists might not be implemented soon enough.

　　Basically the idea is to apply sunscreen to the whole planet.One astronomer has come up with a radical plan to cool Earth;launch trillions of feather-light discs into space，where they would form a vast cloud that would block the suns rays.Its controversial，but recent studies suggest there are ways to deflect just enough of the sunlight reaching the Earths surface to counteract the warming produced by the greenhouse effect.Global climate models show that blocking just 1.8 per cent of the incident energy in the suns rays would cancel out the warming effects produced by a doubling of greenhouse gases in the atmosphere. That could be crucial，because even the most severe emissions-control measures being proposed would leave us with a doubling of carbon dioxide by the end of this century，and that would last for at least a century more.

　　emissionn.發射，發射物 heroinn.海洛因

　　n.住院治療

　　geoengineering n.地質工程 astronomern.天文學家

　　百萬兆; 萬億，兆

　　adj.有爭議的

　　注釋：

　　2. if the worst comes to theworst：如果最最糟糕的事情發生了。這是英式英語的用法，在美式英語中它說成if worst comes to worst。在不同的語境中，有不同的澤法，如：If the worst comes to the worst，Becky thought，my retreatsecure;and l have the right- hand seat inthe barouche.蓓墓想道：逼到最后一條路，逃難是不怕的了，在他的大馬車里，我穩穩地有一個位子了。又如：Ifthe worst comes to the worst，well sell the car.大不了我們把車賣了。

　　4. methadone：美沙酮，一種有效的合成麻醉藥，它不像口馬啡或海洛因那樣容易汁人上癮，在戒毒治療中被用作這些毒品的替代品。

　　1. According to the first two paragraphs，the author thinks that

　　B to reduce carbon emissions is all impossible mission.

　　D actions suggested by scientists will never be realized.

　　A know what they are doing.

　　C think the problem has been solved.

　　3. What does Stephen Schneider say about a heroin addict and methadone?

　　B Methadone is not a correct way to treat a heroin addict.

　　D Methadone and heroin are equally effective in treating a heroin addict.

　　A To ask governments to take stronger measures;

　　C To apply sunscreen to the Earth.

　　5. What is NOT true of the effectiveness of sunscreen，according to the last paragraph?

　　B It blocks the incident energy in the suns rays.

　　D It decreases greenhouse gases in the atmosphere.

　　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。

　　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。

　　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。