Fill in the gaps with suitable prepositions or adverbs where necessary:
1. A decision has to be made_____a period of three months
2. Employment has risen_____ people over 55.
3. We see a rapid growth_____ the use of the Internet.
4.______ average, women live five and seven years longer than men.
5. The trip was cancelled because of concerns______ safety.
6. He believes that children should have control_____ their own lives