k together to achieve our commonpurpose：_________worldthat is safer, cleaner and healthierthan one we found

.It is ______ to spend money on preventing illnesses by promoting healthy living rather than spending it trying to make people ______ after they are ill .

_______ do you go skating

____ the Internet is of great help, I don’t think it’sa good idea to spend too much time on it.

_____should not be allowed to go out at night.