Bài 1: sửa lỗi sai: 1. It is reported that a large number of students have dropping out of school in recent years. 2. It's nearly ten years since he has suddenly left the town. 3. I won't do anything before I heard any news from you. 4. Don't touch anything until the police come, do you? 5. Because an increase in sales, the company is planning to expand its business. 6. The children looked happily as their mother was coming home from work. 7. A lot of information sent to the newspaper are not true. 8. He wouldn't accept that hard job if he doesn't need the money. 9. Today we know that the earth is one of nine planets who orbit the sun. 10. Mr. Jones is an experienced teacher who has been in this school since thirty years.

1. It is reported that a large number of students have dropping out of school in recent years.

=> have dropping => have dropped

2.It's nearly ten years since he has suddenly left the town.

=> has suddenly left => suddenly left

3. I won't do anything before I heard any news from you.

=>heard => hear

4.Don't touch anything until the police come, do you?

=> do you => will you

5.Because an increase in sales, the company is planning to expand its business.

=> Because => Because of

6.The children looked happily as their mother was coming home from work.

=> happily => happy

7. A lot of information sent to the newspaper are not true.

=> are not => is not

8. He wouldn't accept that hard job if he doesn't need the money.

=> doesn’t need => didn’t need

9.Today we know that the earth is one of nine planets who orbit the sun.

=> who => which

10. Mr. Jones is an experienced teacher who has been in this school since thirty years.

=> since => for