1. do you know how much a banana cost? => costs
2. the teacher says ba will be a famous artist in one-day => would 
   Câu gián tiếp của thì tương lai đơn: S + would + V
3. Some boys are playing marble in the schoolyard at recess => marbles
4. Mai learns how to use a computer in her scientific => science
5. there are less tv programs for teenagers than there are for adults => fewer
6. people are living longer so there are more and more many old people => BỎ
7. thanks for invite me to the rice-cooking festival of your village => inviting
8. I'd rather to participate in the contest than watch it => BỎ (rather + V + than)
9. Liz told that she was interested in the rice-cooking contest => said 
10. we won't get to the airport in least than 30 minutes => at (at least: ít nhất)
           #quangvinh