V
9 If you produce rubbish, you will burn harmful smoke.
10 Today, robots aren't very popular because they are too expensive
VI
1 Badminton is Minh's favorite sport
2 Pelé began his career when he was fifteen years old
3Although plastic bags cause pollution, people still use them
VIII
1 How often are the Olympic Games held?
2What are the children doing?
3When and where did the first Olympic Games take place?
4 When did Pelé begin his career?
5Why did you like swimming?
MK LÀM NHIÊU ĐÂY THÔI
