Join each pair of sentences using because, as or since

Join each pair of sentences using because , as or since 
1. Jane didn't join our programme . She had to take a summer course ( as) 
2. He behaved very rudely . Everyone dislikes him ( since) 
3. I won't a able to attend the meeting . I'll be on holiday with my family( since) 
4. It was raining heavily . We decided to stay home and watch TV (as) 
5. Sally was ill . She didn't go to school yesterday (since)