1. (2020·即墨模拟) 阅读短文，选出最佳答案

    When we see well, we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are.

    People who are near-sighted can only see things that are very close to their eyes. Everything else seems unclear. Many people who do a lot of work such as writing, reading and sewing become near- sighted.

    However, people who are far-sighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they 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. They have what is called astigmatisms (散光). 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.

1. （1）           eye problem(problems)is(are)mentioned in the passage.

   A . One B . Two C . Three D . Four
3. （2） If you have the problem of astigmatisms, your eyes         .

   A . can only see close things B . can only see things far away C . aren't exactly the right shape D . have cataracts
5. （3） Long ago, some people became blind because          .

   A . they were near-sighted B . they were far-sighted C . They had astigmatisms D . they had cataracts
7. （4） Perhaps          can become near-sighted more easily.

   A . the writers B . the farmers C . the workers D . the policemen
9. （5） Glasses are useful for those who          .

   ① are near-sighted  ② are far-sighted  ③ have astigmatisms  ④ have cataracts

   A . ①②④ B . ①②③ C . ②③④ D . ①③④