In the future, there will be a new kind of little cars in the street. Everyone can【小题1】 it easily, just like riding a bike. And a kid will also be【小题2】 to drive it. If everyone【小题3】 such a car in the future, the air will be【小题4】 than before. It means there will be less air pollution. The cities will be less crowded. There will be more【小题5】 for all the cars in the cities, and there will also be more space for people to walk in the street.