Question

Choose appropriate option to complete the conversation:

A: Did you post that letter for me?
B: Oh, I'm sorry. I completely forgot. ______________ it now. (I/do)

• A. I'm doing
• B. I'll do
• C. I've done
• D. I'd do

Answer 1

The correct option is B I'll do

The simple future is a verb tense that’s used to talk about things that haven’t happened yet, here, posting a letter. We use the simple future to talk about an action or condition that will begin and end in the future. The formula for the simple future is will + [root form of verb], that is, I (subject) will do, or, I'll do. Hence, Option B is correct.

The rest of the options do not express this condition. They either mention actions that are happening in the present (Options A and C), or actions that are hypothetical/unreal (Option D).

Hence these options are incorrect.