Ответ:
1)-What are you going to do tomorrow?
-I don't know yet.
2)-How many people are you going to invite to your party?
-About 20 friends.
3)-What time is she going to arrive?
-About seven o'clock.
4)-When are they going to go on holiday?
-In July
5)-Is it going to rain later?
-You should take your umbrella
just in case