完形填空。 The United States is full of automobiles. There are still many families 1 cars, but some families have two or 2 more. However, cars are used for 3 pleasure. They are a necessary part of life. Cars are used for 4 . They are 5 to offices and factories by workers who have no other way to get to their jobs. When salesmen are sent to different parts of the city, they have to drive in order to carry their 6 . Farmers have to drive into the city in order to get supplies. Sometimes small children must be driven to 7 . In some cities school buses are used only when children live more than a mile 8 the school. When the children are too young to walk 9 far, their mothers take their mothers take 10 driving them to school. One mother drives on Mondays, taking her own children and the neighbors' children 11 . 12 mother drives on Tuesdays, another on Wednesdays, and 13 . This is 14 forming a car pool. Men also 15 car pools, with three or four men taking turns driving to the place 16 they all work. More car pools should be formed in order to put 17 automobiles on the road and to use 18 gasoline (汽油). 19 is a great problem, and so is the traffic in and around cities. Too many cars are being driven. Something will have to be 20 about the use of cars. (    )1. A. with (    )2. A. ever (    )3. A. more than (    )4. A. pleasure (    )5. A. taken (    )6. A. parcels (    )7. A. school (    )8. A. against (    )9. A. this (    )10. A. pleasure (    )11. A. all (    )12. A. other (    )13. A. so (    )14. A. called (    )15. A. make (    )16. A. that (    )17. A. more (    )18. A. less (    )19. A. Driving (    )20. A. found B. without B. quite B. other than B. travel B. carried B. bags B. farm B. between B. that B. notice B. as well as B. another B. on and on B. taken B. form B. which B. much B. little B. Smoking B. done C. having C. even C. rather than C. trip C. driven C. products C. home C. from C. these C. time C. both C. others C. so on C. given C. take C. where C. fewer C. fewer C. Waiting C. gone D. owning D. very D. less than D. business D. bought D. books D. house D. away D. those D. turns D. as well D. the other D. go on D. made D. know D. what D. many D. least D. Parking D. known