When we can see well, we do not think about our eyes often: It is only when we cannot see perfectly that we come to see how important our eyes are.
People who are nearsighted（近视的） can only see things that are very close to their eyes. Many people who do a lot of close work, such as writing and reading, become nearsighted. Then they have to wear glasses in order to see distant things clearly.
People who are farsighted face just the opposite problem. They can see things that are far away, but they have difficulty reading a book if they don't hold it at arm's length. If they want to do much reading, they must get glasses too.
Other people do not see clearly because their eyes are not exactly the right shape. This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.
When night falls, colors become fainter（更模糊） to the eyes and finally disappear. After your eyes have grown used to the dark, you can see better if you use the side of your eyes rather than the centers. Sometimes, after dark, you see a small thing to one side of you. It seems to disappear if you turn your head in its direction. This is because when you turn your head, you are looking at the thing too directly. Men on guard duty sometimes think they see something moving to one side of them. When they turn to look straight at it, they cannot see it anymore, and they believe they were mistaken. However, this mistake happens because the center of the eye, which is very sensitive (敏感的) in daylight, is not as sensitive as the sides of the eye after dark,
1.According to the passage, a _______ is more likely to be nearsighted.
A. guard B. doctor C. writer D. painter
2.People who are farsighted _______.
A. cannot do a lot of close work without glasses
B. can only see things that are very close to their eyes
C. have the same problem as the nearsighted people
D. have difficulty reading a book if they hold it at arm's length
3.To see a small thing at night, we need to look _______.
A. with wide open eyes B. with half shut eyes
C. straight at it D. in a slightly different direction
Every culture has a recognized (公认的) point when a child becomes an adult, when rules must be followed and tests passed.
In China, although teenagers can get their ID cards at 16, many only see themselves as an adult when they are 18. In the US, where everyone drives, the main step to the freedom of adult life is learning to drive. At 16, American teens take their driving test. When they have their license（证）, they drive into the grown-up world.
"Nobody wants to ride the cheese bus to school," said Eleanor Fulham, 17. "It's like you're not cool if you don't have a car," she said.
According to a recent research, 41% of 16 to 19 year olds in the US own cars, up from 23% in 1985. Although, most of these cars are bought by parents, some teens get part-time jobs to help pay.
Not all families can afford cars for their children. In cities with undergrounds and limited(有限的) parking, some teenagers don't want them. But in rich areas outside the city, if there are no undergrounds, and bicycles are more for fun than cars, it is strange for a teenager not to have a car.
But police say 16-year-olds have almost three times more accidents than 18 and 19-year-olds. This has made many parents stop before letting their kids drive. They need to wait until they are more experienced.
Julie Susiana, of Virginia, decided that her son Chad, 15, will wait until he is 17 to apply for his learner's permit (许可)
Chad said he has accepted his parents' decision, although it has caused some laughing from his friends. "They say that I am unlucky," he said. "But I'd rather be alive than driving, and I don't really trust my friends on the road either."
In China as more families get cars, more 18-year-olds learn to drive. Will this become a big step to becoming an adult?
1.16-year-old drivers have more accidents possibly because _______.
A. they want to show themselves off
B. they are not experienced drivers
C. older people always drive better
D. they never drive carefully on the road
2.Which may NOT be taken into consideration when deciding whether to buy a car?
A. How rich the family is.
B. Whether the kid is old enough.
C. What traffic condition there is around.
D. Whether it's practically needed.
3.The passage mainly gives information about _______.
A. an American culture about teenagers' driving
B. a change in the Chinese culture
C. a cultural difference between America and China
D. the relationship between driving and a person's development
4.Which may serve as the best title of the article?
A. Cars Helping You to Grow Up B. Driving into the Grown-up World
C. Teenagers' Driving in America D. Recognized Point of Becoming an Adult