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A kind of little cars may some day take the place of today's big ones． People will like this kind of small cars more and more． The car is as small as a bike but can（1） 　　two people in it． Everybody can drive it， just like riding bike． Even children and old people can drive them to school and（2） 　　．

If everyone drives such a car in the future， there will be less （3） 　　in the air． There will also （4） 　　more space for all the cars in cites， and the street will have more space for people to walk． Three such cars can fit in the space now needed for one car of the （5） 　　size．

The little cars of the future will cost much less （6） 　　to own and to drive． And they can go only 65 kilometers an hour， so driving will be safer， too．

The cars of the future will be fine for（7） 　　around a city， but they will not be useful for a long trip．

This kind of cars can save a lot of gasoline （汽油）．They will go 450 kilometers （8） 　　needing to stop for more gasoline．

If big cars are still used along with the small of （9） 　　， two sets 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，（10） 　　cars．