Rewrite the sentences that is meanings unchanged.
1. What's the matter, Ba?
=> What's ....................
2. Don't spend too much time playing videogame.
=> You should ...............................
3. I have to do my homework before I play sports.
=> I ouught ..........................................
4. How heavy is his brother?
=> What is ....................
5. Lan needs some cucumbers , and so does Hoa.
=> Lan needs some cucumbers .........................
6. There is not a math class today.
=> We don't ...........................
7. There is a big library in Lan's school.
=> Lan's school ...............
8. English is easy to learn.
=> English is not ....................
9. Lan learns Maths very well.
=> Lan is very good ..................
10. Which subject do you like best?
=> What is your .............................
11. We have a two-month summer vacation.
=> Our summer vacation lasts ........................
12. Vietnamese students have fewer vacations than American ones.
=>American students .......................................................
13. We have a break that last thirty minutes.
=> We have a ...........................................