The Future: will or going to?

Our team is very good. I think they _____ the championship.
1. are going to win
2. will win
3. will won
"I can't do this exercise!" --- "Don't worry. I _____ you."
1. will help
2. am going to help
3. is going to help
There are lots of clouds in the sky. It _____.
1. 's going to rain
2. are will rain
3. will rain
Peter has decided to move from Portimão. He _____ in Lagos.
1. will live
2. is going to live
3. are going to live
Look at that man! He _____.
1. is going to fall
2. will fall
3. will falls
What shall I do tomorrow? I Know! I _____ my bedroom.
1. am going to paint
2. 'll paint
3. is paints
"It's really cold here!" --- "I _____ the window."
1. 'll close
2. am going to close
3. is going to close
If you eat too much, you _____ fat.
1. gets
2. will get
3. are going to get
"Why are you putting on those old clothes?" --- "I _____ my bedroom."
1. am going to paint
2. are going to paint
3. will paint
"Can I help you?" --- "I _____ a coke and a hot dog, please."
1. will has
2. 'll have
3. 'm going to have