18. She said that she often listened to music at night.
19. Lan's mother said that her daughter usually brushed her teeth before meals.
20. They said that they had to do the assignments then.
5:
1.Jane asked Bill when he expected to finish his assignment.
2.The man asked the boy if he could show him the way to the bank.
3.Fred asked the postman if there were any letters for him that day.
4.Henry asked the librarian how many books he could borrrow at a time.
5.John asked his friend how he had managed to know his phone number.
6.He said those old buildings might have already disappeared by the time he was back the following year.
7.The boys asked the old woman what they could do to help her
