TÌM LỖI SAI
1.new shopping mall is being planned for the residential area where new houses are being built at a rapid rate
2.according to the rules of this game, you had better not drop the ball
3 the united states has a younger population as most other major industrial countries
1. where `→` in which
2. had better not `->` mustn’t
3. as `→` than (younger là dạng so sánh hơn nên phải đi với than)