Ответ:

1.When are you going to phone him?

2.Why that tower is going to collapse?

3.How many friends are going to arrive today?

4.How much are you going to pay for her?

Ответ:

1)When he going? 2) Why she going? 3) How many friends going? 4) How much expensive?

5) When he return 6) Why you do that?