5. A

1. I saw your school's advertisement on Tuoi Tre newspaper yesterday. 

2. I am interested in learning English and I would like to know some information about your school.

3. I have studied English for over four years but I want to improve speaking and listening skills.

4. I would be very grateful if you could send some details on the courses and fees.

5. I look forward to hearing from you soon.

1. Duong would have had time for breakfast if she hadn't got up late this morning.

2. I wish I would be taller.

3. A striped shirt can be made.

4. Do you watch the news every day?

5. She asked me which class I was in.

7. He asked Lan what her address was.

8. Was Hai late last night?

9. Flowers are being grown in the spring.

12. He asked what my name was.

13. Tu is a student, isn't he?

14. The house has been built for 3 months.

16. Hung wish there would be some pictures in his house.

17. Tu lives in Binh Giang, doesn't he?

18. We have built the house for 3 months.

19. Hanoi will be visited by Ba tomorrow.

20. Some money was sent to me by my father.