The young man has _____ to sober _____after being drunk?
Answer Details
The correct answer is "begun / up". "Begun" is the past participle of "begin," which is used here to indicate that the young man started to do something. "To sober up" means to become less drunk, so the correct preposition to use with "sober" is "up." Therefore, the sentence should read: "The young man has begun to sober up after being drunk."