24. He asks us not to make so much noise
25. The teacher told Joe to stop talking
26. the children said that they were waiting for the school bus then
27. Mrs. Tam asked her son - Minh why he was often late for that class
29. my friend said that he/she had to go to Hanoi that day
30. Shall we buy energy-saving bulbs?
31. Why don't we use electricity economically?
32. I suggest that you should ask her yourself

11. We are always advised to study harder on the second term by our teacher.
12. The last time she went out with him was 5 months ago.
13. This is the first time we have seen such a cruel mother.
14. We haven't seenMr.Jones for 2 years.
15. I haven't visited USA before.

16. I began learning English 10 years ago.
17. She has moved to London for 20 years.
18. She is too old to work hard.
19. The exercises were so long that I wrote in 15 minutes.
20. This book is such an interesting book that I have read it several times.