Вставьте оборот to be going to 1.He..... work at school next year
2.I.... write to my friend tonight.
3.This guestion is difficult. We ... discuss it later.
4. My mother ... speak to him about this problem on Sunday morning.

Hi is going to work at school next year.I am going to write....This guestion is difficult. We are going to discuss....My mother is going to speak to him.....