The evening was rounded … with a dance.

Analyze the question This tests phrasal verbs with "round". You must pick the particle that forms the correct idiom meaning "to end or conclude something."

Explain the concept Several phrasal verbs with "round" look similar:

• round off means to finish or complete something in a suitable or satisfying way. Example: "They rounded off the meal with coffee."
• round up means to gather people or animals together. Example: "The police rounded up the suspects."
• round out means to make something complete or fuller. It is less common and does not fit "ending an event."
• round down is used with numbers, meaning to reduce to a lower figure.

Show the solution

1. The sentence says the evening ended or was concluded with a dance.
2. We need a phrasal verb meaning "to finish in a pleasing way."
3. "Rounded off" fits exactly: The evening was rounded off with a dance.
4. Checking the others: • "Rounded up" would suggest the evening was gathered together, which makes no sense. • "Rounded down" refers to numbers. • "Rounded out" suggests adding to make something fuller, not concluding it. It is not the standard idiom for this context.

Answer The correct option is A. off.

Tip Think of "round off" as "finish neatly," like rounding off a ceremony, speech, or meal. "Round up" is for gathering things or people, such as cattle or suspects. Whenever an event is being concluded with a final activity, "off" is the word to choose.