Rewrite the sentences

15. Lan's father said to her "You can go to the movie with your friend".
->..
16. The teacher told "We can collect old book for the poor students".
->.......
17. She announced "She doesn't buy this book".
->.
18. "Lan is the most intelligent girl in our class", her classmate said to me.
->.....
19. He said "I will go to school by bus tomorrow".
->.
20. Minh's brother told him "You can use my computer today".
->.