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Answer:
(Have) a nice time in Rome?
Explanation:
"You a nice time in Rome?" Doesn't make any sense because a person can't be time, they can only have time.
Depending on the prompt I`d say formal tone. As if you were going into an interview
The correct answer is phrase, option D. A group of words that functions as a part of speech, but lacks a subject or a predicate is a phrase. It is a conceptual unit, and is only a part of a clause. Examples of phrases are: department store, my children, believing in fairies, and a big, black wolf.