1. He declares to have made a wonderful__ discovery. (science)
2.___ is better than cure, so you should start looking after your heart now. ( Prevent)
3. It was a very__ experience and they were courageous (frighten)
4. The course helps school-leavers broaden their__ of the world of work (know)
5. It is now far more acceptable to start talking about a__ mission to Mars (man)
scientific
Prevention
frightening
knowledge
man-made