Will you pick me up tomorrow morning?

[touchstone]

Use the suitable form of the verb to fill in the blank.
--Will you pick me up tomorrow morning?
--Yes, I____ (promise).

The answer key is ‘have promised’, but I think ‘promise’ is also OK, or even better. What do you say?

Thanks in advance.

 

[GoesStation]

You're right. I have promised would not be a natural response. I promise is.

 

[Tdol]

Yes, I will is the most natural response for me.