1.Your may not see them for years at a time，but just knowing they"re out there makes you feel better：你可能几年都见不到它们一次，但是只要知道它们在那里，你的心情就会比较畅快。注意：may not中的mot可以否定may，也可以否定后面的动词。如否定may，作“不允许”解；如否定后面的动词，做“可能不”解。not是否定may还是其后面的动词，这取决于上下文。在所讨论 的句子中，not否定see。但mayn"t没有歧义，只作“不允许”解。at a time：每次，一次。又如：I am away two weeks at a  time.我每次外出总要两星期不回家。
2.Yosemite：优山美地国家公园（位于加州中东部）
3.Yellowstone：黄石国家公园（位于怀俄明州西北部）
4．Grand Canyon:大峡谷国家公园（位于亚利桑那州西北部）

5.a continually evolving system：一种不断演化的体系
6.…monuments to heroic men and women who molded this country…：……为塑造这个国家而献身的英雄儿女纪念碑……
7.a host of other experts：许多其他的专家
8.pocket park：处于城市建筑群之间的小公园
9.Growing communities thirsty for recreational outlets…：渴望娱乐场所不断发展的社区……

Why are America"s national parks like old friends?

A:Because they are always out there B:Because they are very old C:Because they make people feel better D:Because they are very famous

The sentence that "your money was so old" in the second paragraph means______

A:you have an old pound note B:your money was useless C:you have a lot of money D:you inherited a fortune from your ancestors______

Passage One
Generation gap refers to the difference in ideas, feelings, and interests between the older and younger people. It is especially considered as causing a lack of communication and understanding between the two generations.
There is apparent generation gap between the young and the old nowadays. The younger generation is essentially different from the older generation. The young people live in a new age completely different from the old. They have grown up more happily and are not so dependent on adults as their parents were. They are better educated and enjoy more freedom. They easily accept new things and new ideas. They are more concerned with the present and the future, whereas the world of the older people has vanished, and they do not understand all of the problems of the modern world. They grew up in a world which was different from today’s world. They often talk about "the good old days" and tend to assert old things and ideas. They don’t like to feel that their beliefs and values are being questioned and threatened. They would like the young to learn from them, but the young refuse to accept their values. They cannot understand why the young complain about the conventional things and old systems and why they want to make changes in these things to fit the needs of modern society, As a result, the old people think the young are not what they were, and most young people are unable to learn from the parents and elders who they will never be.
In order to reconcile the differences, both generation should realize that the world has changed, and that new responses are necessary for many of the problems of society. Besides, some forms of organizations should be established to help the young and the old exchange their ideas and strengthen their mutual understanding so as to bridge the gap.

A:The young people. B:The old people. C:The young and the old people. D:The parents.

Passage One
Generation gap refers to the difference in ideas, feelings, and interests between the older and younger people. It is especially considered as causing a lack of communication and understanding between the two generations.
There is apparent generation gap between the young and the old nowadays. The younger generation is essentially different from the older generation. The young people live in a new age completely different from the old. They have grown up more happily and are not so dependent on adults as their parents were. They are better educated and enjoy more freedom. They easily accept new things and new ideas. They are more concerned with the present and the future, whereas the world of the older people has vanished, and they do not understand all of the problems of the modern world. They grew up in a world which was different from today’s world. They often talk about "the good old days" and tend to assert old things and ideas. They don’t like to feel that their beliefs and values are being questioned and threatened. They would like the young to learn from them, but the young refuse to accept their values. They cannot understand why the young complain about the conventional things and old systems and why they want to make changes in these things to fit the needs of modern society, As a result, the old people think the young are not what they were, and most young people are unable to learn from the parents and elders who they will never be.
In order to reconcile the differences, both generation should realize that the world has changed, and that new responses are necessary for many of the problems of society. Besides, some forms of organizations should be established to help the young and the old exchange their ideas and strengthen their mutual understanding so as to bridge the gap.

A:The Old World and the New World. B:Generation Gap. C:The Good Old Days. D:The Dead Convention.

Passage One
Generation gap refers to the difference in ideas, feelings, and interests between the older and younger people. It is especially considered as causing a lack of communication and understanding between the two generations.
There is apparent generation gap between the young and the old nowadays. The younger generation is essentially different from the older generation. The young people live in a new age completely different from the old. They have grown up more happily and are not so dependent on adults as their parents were. They are better educated and enjoy more freedom. They easily accept new things and new ideas. They are more concerned with the present and the future, whereas the world of the older people has vanished, and they do not understand all of the problems of the modern world. They grew up in a world which was different from today’s world. They often talk about "the good old days" and tend to assert old things and ideas. They don’t like to feel that their beliefs and values are being questioned and threatened. They would like the young to learn from them, but the young refuse to accept their values. They cannot understand why the young complain about the conventional things and old systems and why they want to make changes in these things to fit the needs of modern society, As a result, the old people think the young are not what they were, and most young people are unable to learn from the parents and elders who they will never be.
In order to reconcile the differences, both generation should realize that the world has changed, and that new responses are necessary for many of the problems of society. Besides, some forms of organizations should be established to help the young and the old exchange their ideas and strengthen their mutual understanding so as to bridge the gap.

A:the young generation B:the old generation C:nobody D:the young and the old generations

In the last century, old people did not have so many problems because ______.

A:they had big families B:they lived with their children C:the young were kind to the old D:the society didn't change so rapidly

How do you understand "the good old days"

A:They refer to those days of happy life. B:They refer to the Gold Age in the Roman and Greek mythology. C:They refer to the old time in which the old people grew up and which was deemed by themselves as good days. D:They refer to the past days when the society was good.