We enjoyed ourselves … much at the party.

Analyze the question: We need a word that correctly fills the gap in "We enjoyed ourselves ____ much at the party."

Concept: The word "much" is an adverb here, modifying the verb "enjoyed". To intensify "much", we use an intensifier such as very. Note that "very much" is the standard collocation for degree with verbs like enjoy, like, love, and thank.

Testing each option:

• A. too – "too much" means excessively. It is grammatically possible, but it suggests we enjoyed ourselves more than was good, which is an odd meaning for a party. It is not the best fit.
• B. that – "that much" is informal and usually appears in negatives or questions ("I didn't enjoy it that much"). In a positive statement like this, it sounds incomplete.
• C. as – "as much" needs a comparison to complete it ("as much as we had hoped"). Without that, the sentence is incomplete.
• D. very – "very much" is the natural, correct intensifier. It gives the meaning greatly: "We enjoyed ourselves very much at the party."

Answer: D. very

Tip: Remember that "very" cannot go directly before a verb ("We very enjoyed" is wrong), but "very much" works with verbs of feeling and liking, such as enjoy, appreciate, and like. Also, "too" and "as" often signal that something else is needed: "too much" signals excess, and "as much" signals a comparison.