Exercise 2: Passive voice: The Past simple tense (Quá khứ đơn)
1. The waiters cleaned the rooms.
 _________________________________________________
2. They caught the elephant.
 _________________________________________________
3. They built the house.
 _________________________________________________
4. The pupils made the cards.
 _________________________________________________
5. Nguyen Du wrote Kieu story.
 _________________________________________________
6. John met Fiona.
 _________________________________________________
7. Some drunk drivers caused the accident.
 _________________________________________________