1 . 单句改错
1. We are impossible to finish the work in such a short time.
2. It’s known that the cost in big cities is very expensive.
3. He came here to attend the meeting in car.
4. I haven’t heard from your letter for a long time and I miss you very much.
5. I have many collections of stamps, some of them are my favorite.
6. If you hear the alarm, stand in line at the door and wait your teacher to lead you outside.
7. We, together with our teacher, visited a local nursing home in last week.
8. One of the questions is: Who will you go in times of trouble?
9. Some will turn out to their parents or teachers for help.
10. In my opinion, students can benefit a lot doing some housework.

3 . 改错
1. When I studied chemistry high school, I reconsidered my goal and decided to be a doctor.
2. I want my cafe to have a special theme such as like "Tang Dynasty".
3. From then on, I started to play my football with classmates after school. I am a good player now.
4. In the cafe, customers will enjoy yourselves in the historical environment that is created for them.
5. They also had a small pond which they raised fish.
6. At the end of our trip, I told my father that I planned to return for every two years, but he agreed.
7. Still I was unwilling to play the games for them sometimes.
8. They would say to us that playing card games would help my brain.
9. I had done myself homework but I was shy.
10. It was a relief and I came to a sudden stop just in the middle on the road.
11. They have also bought for some gardening tools.
12. When I look at this picture of myself, I realize of how fast time flies.
13. Mr and Mrs Zhang all work in our school.
14. This picture often brings back to me many happy memories of your high school days.
15. Instead, he hopes that our business will grow steadily.
16. If we go on a trip abroad, we can broaden your view and gain knowledge we cannot get from books.
17. At the first, I thought I knew everything and could make decisions by yourself.
18. When he came back, I found a bunch of flowers in her hand.
19. Every time he arrived home at the end of the day, we’d greet her at the door.
20. My uncle says that he never dreams becoming rich in the short period of time.
21. At last, I will be on my own, but I still want to have my parents to turn to whenever I need help.
22. Dad cleaned the house, and then went on shopping.
23. While they chatted, my father would lift my sister and me up to sit in the top of the fridge.
24. If you are me ,would you talk to him?
25. Close to the school there was a beautiful park with many trees around them.
26. Five minutes later, Tony saw parents.
27. We appreciate our apologies and goodwill, but we hope that you can figure a good way of settling the matter.
28. Neither of the arrows hit the target.
29. If it's a false alarm and there is no fire, your teacher will lead us back to the classroom.