1 . 单句改错
1. If you will attend the meeting, you’d better leave now.
2. Their long struggle ended with failure.
3. No matter how happened, he would not mind.
4. His failure resulted in his carelessness.
5. We couldn’t have found a good place for a picnic.
6. Thieves broke in my house when I was out.
7. The Great Wall is so a well-known tourist attraction that millions of people pour in every year.
8. There is to be a total ban of smoking in the office.
9. It is recognized what this way could be better.
10. All the workers belonged to the factory must obey the rule.

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.