=>
1. can you -> can't you
2. doesn't he -> didn't he
3. will -> will they
4. isn't this -> isn't it
5. isn't -> hasn't
6. không sai
7. does -> doesn't
8. parks -> park
11/
1. Jane's school has more buildings than Peter's school.
2. Peter's school has fewer classrooms than Jane's school.
3. Jane's school has less classroom equipment than Peter's school.
4. Peter's school has more student clubs than Jane's school.
5. Peter's school has less time for self-studying than Jane's school.
12/
1. There are more criminal cases in my country now than 3 years ago.
2. There are fewer wealthy people in big cities than in big cities.
3. Your city has more slums than mine.
4. The standards of living in rural areas shows less improvement than in the cites.
5. Modern factories produce fewer carbon dioxide emissions than old factories.
