Choose the word
This summer I'll go / I'm going to England with my friends
I'm going
This change mustn't be correct. You've given me more money than I gave you!
This change can't be correct. You've given me more money than I gave you!
Sorry, I / have I met you before?
have I
We are friends since I was six
We've been friends since I was six
I'm not sure at the moment, but I can / might be a bit late tomorrow
might
I think you like it when you see it
I think you'll like it when you see it
I've known him for / since a long time
for
You have heard about the concert?
Have you heard about the concert?