1 . 单句改错，每句只有一处错误，只涉及一个单词的增加、删除或修改
1. You could turn to your teacher if you are in the trouble.
2. Police are good people, but they can’t do anything.
3. He found his son trapping under the fallen building, feeling very worried.
4. Two churches completely destroyed by fire last night in northeast Mississippi.
5. It was the first time that the Chinese planted vegetables in space.
6. After graduation, he returned to the small hometown which he grew up.
7. The young lady has been devoted to teach the deaf children.
8. Burying in doing research in the lab, he has no time for a holiday.
9. He wrote many children’s books, nearly half of them were published in the 1990s.
10. The places outside the towns where they were sent to live was the poorest parts of South African.

2 . 单句改错
1. The other day I am showing the boys the weekly chemistry when the mixture bubbled everywhere.
2. Sometimes I wonder how relevant chemistry is with these students.
3. It was such privilege to have spent a day with Tombe’s family.
4. You have to get used to a whole new way of life, that can take up all the concentration in the beginning.
5. Two centuries later, the Spanish had settled in most parts of South America and along the northwest coast of where we now call the United States.
6. Humans differ with other animals in their ability to speak.
7. He found the problem difficultly to solve.
8. The position of the classroom with its view made me felt like I was dreaming.
9. The question that the sports meeting will be held on time will be discussed tomorrow.
10. The criteria is so strict that it is difficult to get new ideas accepted unless they are truly novel.