在下列短文的空格内填入适当的词，每格只能填一个词。 (每空格0.5分，共10分)

Cars are ____1 important part of life in the United states. Without a car most people feel that they are _____2. And _____3 if a person is poor he doesn't feel really poor when he ______4 a car.

There are three main reasons that the car became popular in the United States. First of ____5 the country is a huge one and Americans like to move around in it. The carprovides the ______6 comfortable and cheapest form of transportation. With a car people can go any place ______7 spending a lot of money.

The ____8 reason that cars are popular is the falt that the United States developed and efficient and inexpensive form of _____9 transportation. Long - distance trains have never been _____10 common in the United States as they are in other parts of the ______11. Nowadays there is a good system _____12 air - service providing planes. But it is _____13 expensive to be used frequently. The ____14 reason is the most important one， though. The American spirit of independence is what really made cars ______15. Americans don't like to wait ______16 a bus， or a _____17 or even a plane. They don't like to have _____18 follow an exact schedule. A car gives them the freedom to schedule their _____19 time. And this is the freedom that Americans want most to _____20.

参考答案：

IV.

1. an

2. poor

3. even

4. has

5. all

6. most

7. without

8. second

9. public

10. as

11. world

12. of

13. too

14. third

15. popular

16. for

17. train

18. to

19. own

20. have