1 . 单句改错
1. Many the students go to school on foot every day in this area.
2. Don’t worry. You have the plenty of time to do the work.
3. Srikanth was prevented study sciences because it was thought to be too “dangerous” for a blind student.
4. Actually, there are grammatical mistakes made by students that keep them from written good compositions.
5. Compare with other teachers, Mr. Li pays more attention to his way of teaching.
6. Compared the skin of the upper arm to that on the elbow, you will find the former is smoother.
7. There is a limit to people’s life, but no limit to learn the knowledge.
8. Before the tourists set off, they spent much time setting a limit for the expenses of the trip.

2 . 单句改错
1. －You have made great progress in English. How could you achieve it?
－I changed my approach to learn English.
2. This kind of change certainly will reflect people's thinking and creative activity again.
3. The out parts of something are the parts which contain the other parts and which are furthest from the centre.
4. If you don't know what you want you might end up to get something you don't want.
5. We hope, in a short, to bring theory and practice together in each class.
6. The old man found it difficult to exist in his pension (养老金) alone.
7. When you don't like what is happening, I suggest do something else.
8. It is true that we cannot help but admiring his courage.
9. Your car needs repaired immediately, otherwise it would cause traffic accidents.
10. If you keep too much attention to, you risk missing important information.
11. Have you read the novel reflected the life of the Chinese peasants?
12. If he continues like this, he will end up with lifting a stone only to have it drop on his on foot.
13. It is surprising that he sleeps all day long.