Помогите пожалуйста,не могу объяснить выбор..Упражнение 6. Complete the conversation. Use 'm going to, 're going to, ‘ll or won't.Объясните выбор(!!!!)ОБЯЗАТЕЛЬНО.
A: (1) I ___________ play tennis this afternoon.
В: Great! (2) I ___________ come with you.
A: But you haven't got a tennis racket.
В: (3) I ___________ borrow my brother's racket.
A: And you don't know how to play tennis.
В: (4) I ___________ practise first.
A: But (5) I ___________ play with Phil and after the match (6) we ___________ have lunch with his parents.
В: Oh! Well, then (7) I ___________ come with you. (8) I ___________ do my homework.