1. Plant more trees and the air will be fresher.
=> If we plant more trees, the air will be fresher.
2. New York is more exciting than any other cities in the world
=> New York is the most exciting city in the world.
3. Cartoons are funny and exciting, so most children like watching them.
=> Because cartoons are funny and exciting, most children like watching them.
4. Nga likes table tennis the most.
=> Nga's favourite sport is table tennis.
5. It's not good for children to spend too much time watching television.
=> Children should not spend too much time watching television.
6. Jim loves animals, so he likes to watch Animal programme.
=> Jim likes to watch Animal programme because he loves animals
7. There are three interesting films on VTV3 today.
=>Today VTV3 has three interesting films.