A

　　A kind of little cars may be seen in the streets in the future. People will like this kind of small cars better than the big ones. The car is as small as a bike. But it can carry two people in it. Everybody can drive it easily, just like riding a bike. Even children and old people can drive them to schools or parks。

　　If everyone drives such cars in the future, there will be less pollution in the air. There will be more space for all the cars in cities, and there will also be more space for people to walk in the streets。

　　The little cars of the future will cost less money to buy and to drive. These little cars can go only 65 kilometers an hour, so driving will be safer. The cars of the future will be fine for going around the city, but they will not be useful for a long trip。

　　This kind of cars can save a lot of gas. They will go 450 kilometers, then they have to stop for more gas。

　　They are nice cars, aren't they?

　　46. If you drive this kind of little cars for four hours, you can probably go at most。

　　A. 260 kilometers B. 65 kilometers

　　C. 450 kilometers D. 130 kilometers

　　47. Why do these little cars have to stop after going 450 kilometers?

　　A. For more water. B. For more gas。

　　C. To have a rest. D. To charge (充电)

　　48. Which of the following statements is NOT true?

　　A. Driving big cars can make the air dirtier。

　　B. The little cars can make more space for other cars and people。

　　C. These little cars will be useful for a long trip。

　　D. This kind of cars can save much gas。

　　答案：ABC