1 . 单句改错
1. The majority of doctors believes that smoking is harmful to peoples health.
2. The law was finally passed in response on public pressure.
3. They are likely to respond positively for the presidents request for aid.
4. Four years later, he was elected the chairman in our school once again.

2 . 单句改错
1. My son, who is a 18-year-old young man, now is a university student.
2. We may be one family and live under a same roof.
3. The production now is four times that it was ten years ago.
4. The experiment was much more easier than we had expected.
5. He had an astonishing look on his face when he heard the news.
6. It becomes the colder and colder when winter comes.
7. The old man caught the boy by his arm.
8. These documents are not accessible by the public.
9. He studied hard every day, aimed at passing the exam.
10. About 80 percent of web traffic are in English.