六. 阅读理解 (每小题2分，共40分)

阅读下面短文，掌握大意，然后从每题所给的A, B, C, D四个选项中选出最佳选项

A

A kind of little cars may some day take the place of today’s cars. If everyone drives such cars in the future，there will be less pollution in the car. There will also be more space for parking cars in cities，and the streets will be less crowded. Three such cars can fit in the space now needed for one car of the usual size.

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

51. There is much pollution in the car today because________.

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

C. the cars go 65 kilometers an hour        D. the cars can go 450 kilometers an hour

52. The usual size of cars today are ______that of future cars.

A. much smaller than                   B. much the same as

C. three times as large as                 D. a little larger than

53. We can learn from the passage that________.

A. big cars cost less to own and to drive      B. big cars are not useful for long trips

C. the cars of the future will be much smaller than today’s cars

D. small cars are faster than big ones

54. The street will be less crowded because______.

A. there will be fewer cars in the future     B. there will be fewer passengers in the street

C. driving future cars will be safe          D. future cars will be much smaller

55. Two sets of roads may be needed in the future because ______.

A. there will be too many cars in the future

B. more and more people will get around a city

C. big cars and little cars may be used along with each other

D. it looks more beautiful to have two sets of roads