M: So a lot less unburned fuel comes out to pollute the air.

　　W: And the bus will need less fuel. So with the saving on fuel cost, they say this will all pay for itself in just six months.

　　M: Sounds like people should all go out and get some this stuff to spray their car engines.

　　W: Well, it’s not really that easy. You see, normally, the materials are fine powder. To melt it so you can spray a coat of it on the engine parts, you first have to heat it over 10000 degrees and then, well, you get the idea. It’s not something you or I will be able to do ourselves.

　　23. What is the conversation mainly about?

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

　　25. What is the new material?

　　三、选词填空

　　1. I) 2. B) 3. D) 4. E) 5. F) 6. G) 7. K) 8. M) 9. N) 10. O)

　　四、改错

　　1. like → as

　　2. Those → Some

　　3. or → and

　　4. called as→ call

　　5. Such → Such an

　　6. that → which

　　7. essential → nonessential or +not

　　8. visits → visits to

　　9. basic → based

　　10. economist → economist's

　　五、短问

　　1. It was a basis for the academy founded by Franklin.

　　2. Latin and Greek

　　3. to learn moral and ethical principles

　　4. practical

　　5. practical skills

　　六、翻译

　　1. mainly due to stress and tension in their work

　　2. more than two and a half million families have been lifted out of poverty

　　3. All the board members except the Chairman voted for my proposal

　　4. providing new growth opportunities for China's foreign and domestic trade

　　5. This is especially true of developed countries</P< p>