What many people worry about |
The (1)_________ |
How to prevent polluting the air |
By catching a bus or a train (2)_________ of a car |
What people can do to have enough exercise |
(3)_________ or cycling |
Why parents still use cars to take their children to school |
Because they think cars are quicker and(4)_______ |
The best way for children to go to school |
Taking a (5)_________ bus |