This question already has an answer here:
- “going to” vs “will” 4 answers
I was playing an ESL Future Tenses Review Game when I came across the following question:
You and your friend are reading. It's getting dark and you decide to turn on the light. You stand up and walk towards the light switch.
A: What are you doing?
- I'll turn on the light.
- I'm going to turn on the light.
- I'm turning on the light.
According to Cambridge Dictionary we use will when we make rapid decisions. Isn't this the case in the game? I am asking, because the right answer turned out to be "going to turn on the light" - am I missing anything obvious here or is it a mistake in the game?