[单项选择]We expect Mr. White will ______ Class Two when Miss Brown suffers from heart attack.


A. take over
B. take up
C. take off
D. take to

Passage Two
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 nearsighted can only see things that are very close to their eyes. Everything else is not so clear. Many people who do a lot of close work, such as writing, reading and sewing, become near sighted. Then they have to wear glasses in order to see distant (远处的) things clearly’.
People who are nearsighted 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 astigmatism (散光). This, too, can be corrected by glasses. Some people’s eyes become cloudy because of cataracts (白内障). Long ago these
A. have a curable disease in their eyes
B. have eyes that are not exactly the right shape
C. have a difficulty that can be corrected by an operation
D. have an eye difficulty that cannot be corrected by glasses