MCQ Practice English 📖 He became rich overnight. What part of speech is 'overnight'? A a noun B a preposition C an adjective D an adverb Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up Previous'He became a politicial'. - Here the word 'politician' is used as - NextHe called on me --- my office.