题目内容：

Cars for Tomorrow

A kind of little cars may take the place of（代替）today’s big ones. The car is as small as a bike but can carry two people in it. If everyone drives such cars in the future，there will be less pollution（污染）in the air. There will also be more space in cities，and the streets will have more space for people to walk.

The little cars will be cheap. These little cars can go only 65 kilometers an hour，so driving will be safer, too. The cars will be fine for getting around the 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 before needing to stop for more gasoline.

If big cars are still used along with the small ones，two kinds of roads will be needed in the future. One will be needed for the big, fast cars and the other will be needed for the smaller, slower ones.

根据短文内容，选择最佳答案。

1.There is much pollution in the air today because           .

A. people drive big cars    B. people drive little cars

C. people take a bus to work    D. the usual size of cars today is too small

2.There will be more space in the streets because           .

A. there will be fewer cars    B. there will be fewer people in the streets

C. no people will drive cars    D. future cars will be much smaller

3.Can the little cars of the future save a lot of gasoline?

A. Yes, they can.    B. No, they don’t.    C. No, they can’t.    D. Yes, they are.

4.Which of the following is true according to the passage?

A. There will be too many cars in the future

B. More and more people will live around

C. Big cars run faster and small cars run slower

D. It looks more beautiful to have two kinds of roads