44. In the second paragraph, the author wants to prove that

　　.

　　A. too many schoolchildren take buses every day

　　B. the cost of fuel has increased

　　C. the school buses consume more fuel than average

　　D. the school buses usually go on long routes

　　45. In the third paragraph, what does Bob Riley mean'?

　　A. The fuel prices for school buses need to be negotiated again.

　　B. High fuel prices are also affecting the efficiency of their services.

　　C. The fuel prices for school are much higher than others pay.

　　D. The American School Bus Council should work for students’ benefit.

　　46. What is the advantage of reducing school bus service according to the passage?

　　A. More fuel will be saved.

　　B. Students can go to school in a safer way.

　　C. Students can exercise by walking or riding to school.

　　D. Traffic jams will be reduced during rush hour.

　　47. What is the sixth paragraph mainly about?

　　A. Bob Riley's concern about the results of reducing school buses.

　　B. The convenience brought by school buses.

　　C. The bad effects of reducing school buses.

　　D. The studies about students' choices carried out by the American School Bus Council.

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