I think in 100 years AI will take over/is going to take over the world.
will take over
With the way her grades are now, she is going to/will fail the class.
is going to
Look at the sky! It’s raining/It’s going to rain soon.
It’s going to rain
I can’t promise anything, but I will go/I’m going if I’m not busy.
will go
We can’t come to school tomorrow, we will go / are going to the chess tournament.
are going
I can’t go out tonight, I eat dinner/am eating dinner with my family on Sundays.
eat
The store is opening/opens at 10:00 so we should leave soon.
opens
This time tomorrow we are/will be in Paris
will be
Sorry about the vase, I’ll buy / I’m buying you another one!
I’ll buy
Stop doing that! You are going to/will hurt yourself!
are going to
I’m going to / I will ask my parents if I can go to the party. (spontaneous decision)
I will
Don’t worry. I’m sure you will pass/are passing the exam.
will pass