Hãy đổi từ thể chủ động sang thể bị động
1. He left the briefcase on the counter
2. Helen took the newspaper on the table an hour ago
3. She will write a report to the direction this afternoon
4. A lot of students can attend the English class tomorrow
5. They have found the laptop in the park
6. The workers are building two houses at the same time
7. He has to finish the work before dark
8. John was preparing the lesson all last night
9. They are speaking English in class
10. The mother was cooking dinner when they came back
