Question

what is the best way to punctuate the sentence?
umm! thats not what i meant.
umm! thats not what i meant.
umm: thats not what i meant.
umm, thats not what i meant.
clear selection
what is the purpose of the interjection in the following sentence?
good grief! i thought we wouldnt have so much homework on friday!
to show agreement
to show frustration
to show excitement
to show relief

Explanation:

For the first question, "Umm! That's not what I meant." is correct. The exclamation mark after "Umm" shows a strong emotion (like hesitation or a sudden thought), and "That's" is correctly capitalized as it starts a new sentence.
For the second question, "Good grief!" is an interjection showing frustration. The speaker is expressing annoyance at having a lot of homework on Friday.

Answer:

First question: Umm! That's not what I meant.
Second question: to show frustration