Future Simple / to be going to

Oh look! It is going to/ will snow soon.

Next summer I am going to/ will backpack around Europe.

Ring! Ring! I am going to/ I’ll answer it.

I think our team is going to/ will win the match.

In 2055 robots are going to/ will be our teachers.

Tonight we are going to have/ will have a birthday party for my brother.

My friends are going to/ will go to the movies tonight.

I doubt that he is going to/ will pass the English test.

Be careful! You are going to/ will drop the dishes.

Look out! That dog is going to/ will bite you if you get near him.

Коли вживаємо Future Simple?

Коли вживаємо "to be going to"?