3 . 下列每句话中都有一处错误。错误涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下面划一横线，并在该词下面写出修改后的词。
注意：1. 每处其修改均仅限一词；
2. 只允许修改10处, 多者（从第11处起）不计分。
1. Though they are tired, the rescuers are still in search the missing people in the flood.
2. You can telephone me every a few days, and in that way we can keep in touch with each other.
3. After school, the students walked out of the classroom one after other.
4. They left without leaving a message, that was more than we had expected.
5. It is well-known, China is rich in natural resources.
6. We haven’t seen him again ever since he has left the city.
7. He set us a good example and was thought high of by all the teachers and students in our school.
8. It was not until she got home when Jennifer realized she had lost her keys.
9. Some pre-school children go to a day care center, which they learn simple games and songs.
10. In their opinions, you are making a huge mistake.

4 . 根据句意，选择单词或短语并以其适当形式填空。

concern, doubt, admit, transport, reward, rescue, present, charge, fight, quality

1. There is no ________ that the search for those lost cultural relics will continue.
2. The air pollution is more and more serious at ________.
3. Sun Yingsha practised hard every day in order to be ________ as a competitor in the Olympic Games.
4. Who will take ________ of the company after the manager retires?
5. Nelson Mandela devoted his whole life to ________ for the freedom of the black.
6. John wanted to give 100 yuan as a ________ to the taxi driver who had found his wallet.
7. Ten fishermen were saved in a difficult sea ________.
8. What kind of ________ do you prefer to use: bus or train?
9. Our products of high ________ sell well in Britain.
10. As far as I am ________, you can do what you like.