阅读下面短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
A kind of little cars may take the place of today’s big ones many years later. If everyone drives such cars in the future, there will be less pollution in the air. There will also be more space for parking in cities, and the streets will be less crowded.
The little cars of the future will cost less. Driving will be safer, too, since these little cars can go only 65 kilometers an hour. The cars of the future will be fine for going around a city, but they will not be useful for a long way. Little cars will go 450 kilometers before they need to stop for more gasoline (汽油). If big cars are still used with the small ones, two kinds of roads will be needed in the future. Some roads will be needed for the big, faster cars and other roads will be needed for the small, slower ones.
根据短文内容，选择正确答案。
【小题1】There is much pollution in the air today because ________.
| A．people drive big cars |
| B．people drive little cars |
| C．small cars will go 450 kilometers before they need to stop for more gasoline |
| D．the usual size of cars today is too small |
【小题2】The usual size of cars today is ________.
| A．much smaller than the future one |
| B．as big as the future ones |
| C．as small as the future ones |
| D．bigger than the future ones |
【小题3】Which of the following statements (陈述) is NOT true?
| A．Big cars cost more. |
| B．Big cars are not useful for a long way. |
| C．The cars of the future will be smaller than today’s cars. |
| D．Small cars are slower than big ones. |
【小题4】The streets will be less crowded because ________.
| A．there will be fewer cars in the future |
| B．there will be fewer people in the streets |
| C．three kinds of roads will be built |
| D．future cars will be smaller |
【小题5】Two kinds of roads will be needed in the future because ________.
| A．there will be too many cars in the future |
| B．more and more people will go to cities |
| C．big cars run faster and little cars run slower |
| D．it looks more beautiful to have two kinds of roads |
