Normally he stays __________ until 11:00 p.m. these days.
Tripura Public Service Commission - 2026,
Answer: A
The answer is up: Normally he stays up until 11:00 p.m. these days.
To stay up means to remain awake and not go to bed, which is exactly what a bedtime of 11:00 p.m. describes. The phrasal verb is the standard way to say it: stay up late, stay up all night.
Stays on and stays in do not take a time limit in this sense: stay in means to remain at home and stay on means to remain in a place or post. Stays out (option B) is also an English phrase, meaning to remain away from home, so a reader could defend it; the official key gives up because the sentence is about the hour he goes to bed, and that is the reading kept here.
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