5. Use because or so in these sentences

1. I'm going to spend this day with my friend because she has a birthday party.
2. Karl is excited about new performance at the theatre, so he's going to buy a ticket.
3. My parents want to live near the sea, so they're going to book a hotel there.
4. My granny isn't going to do gardening because this summer will be cool.
5. I'm not going to drive a car because I don't have driving license.
6. Tim wants to travel around the world, so he's going to learn English.