23. What is the conversation mainly about?

　　【解析】[C]女士說為了環保應該多乘坐

　　公共交通設備，因此之后的話題便圍繞如何節能保護環境的問題展開。這段對話主要討論的是公共汽車的節能問題，討論了如何讓公共汽車燃料更有效的利用，因此[C]符合題意。

　　24. Why did the woman decide to ride the city bus?

　　【解析】[B]對話開頭部分就交代了此題答案，那位女士說她不開自己的車而該乘公車是為了降低環境污染。從她提到的So I decided the air will be a lot cleaner if we all use public transportation when we could 即可得知。

　　25. What is the new material?

　　【解析】[D] 這種新的材料是在引擎部位噴灑的一種絕緣材料。從女士的話中there is a material that’s a really good insulator. And a thin coat of it gets sprayed on the certain part of the engine即可得出。這種材料的用途是將燃料燃燒的熱量反射回去，從而達到提高效率的結果。

　　Section B

　　Passage One

　　A guide dog is a dog especially trained to guide a blind person. Dogs chosen for such training must show good intelligence, physical fitness, and responsibility.

　　At the age of about fourteen months, a guide dog begins an intensive course that lasts from three to five months. It becomes accustomed to the leather harness and stiff leather handle it will wear when guiding its blind owner. The dog learns to watch traffic and to cross streets safely. It also learns to obey any command that might lead its owner into danger.

　　The most important part of the training course is a four�瞱eek program in which the guide dog and its future owner learn to work together. However, many blind people are unsuited by personality to work dogs. Only about a tenth of the blind find a guide dog useful.

　　Questions 26 to 28 are based on the passage you have just heard.

　　26. How long does the intensive course last?

　　【解析】[A]文中明確提到an intensive course that lasts from three to five months，因此正確答案為 [A]。

　　27.Which of the following is not a necessary skill guide dogs have to learn?

　　【解析】[D]答案依據是The dog learns to watch traffic and to cross streets safely. It also learns to obey any command that might lead its owner into danger. 從這兩句中可看出看家不屬于導盲犬訓練范圍內的技能。

　　28.How long does the most important training course last?

　　【解析】[C]最重要的訓練課程持續四周。文中明確指出了本題答案。The most important part of the training course is a four�瞱eek program，從此句中即可看出。

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