Here are the sentences with the verbs in brackets filled in with the correct form of "will" or "be going to":

1. Will you sign here, please?
2. Are you going to call me at five? I have to catch an early train.
3. Are you going to walk there in this train? You’ll get awful wet.
4. Will you be angry if she refuses to help you?
5. Why have you brought your computer? Are you going to work this weekend?
6. Will you do something for me? Yes, of course. What is it?
7. Will you be ill?
8. Will you have it ready in five minutes?
9. Are you going to have another cup of coffee? No thanks.
10. Will you lend me your fishing rod? Yes, of course. Where are you going to fish?
11. Are you going to buy stamps? Yes, I am. Then you will buy some for me, please.
12. There’s the phone again. Take notice. You will not answer.
13. If I catch some fish, will you cook them for me?
14. What are all those notes for? You are going to give a lecture?
15. Philipp will be in 15 next Wednesday.
16. They are going to get a new computer.
17. I think my mother will like this CD.
18. Paul's sister is going to have a baby.
19. They will arrive at about 4 in the afternoon.
20. I must help you with the bags.
21. In 2020 people will buy more hybrid cars.
22. Look at the clouds! It is going to rain.
23. He will be a dancer.