Collocations for sober - adj.

be, feel, look, seem | remain, stay
She wanted a drink, but she had to stay sober.

keep sb
Only the thought of her kept him sober.

completely, perfectly, quite, stone-cold | not entirely | almost, fairly, more or less, pretty well, reasonably, relatively
By this time he felt more or less sober again.

enough
At that point she was still sober enough to ask sensible questions.