1. We worked very hard for the exam. Then we passed it. → After → Before we passed the exam, we had worked very hard for it. 2. First my sister considered what to say. Then she decided to talk to her headmaster. → After → By the time 3. I learned my lessons. Then I went out for a walk. → After → Before I went out for a walk, I had learned my lessons 4. Her brother bought a new washing machine. First he checked the prices. → After → Before 5. My mother took an aspirin. Then she felt a little better. → After → Before 6. The boys argued. Then they fought. → After → Before 7. His aunt went out to the food store. Then she had an accident. → After → Before 8. We decided to go on a trip to Hue. First we had some problems. → After → Before 9. The students read some materials. Then they wrote their assignments. → After → By the time 10. He watched the football match. Then he wrote a report. → After → Before