Directions: Which of the following sentences has a 'modal verb'?
- ASeeing is believing.
- BHer sister known to me.
- CShe comes here to study.
- DYou must improve your spelling.
Solution & Step-by-step Explanation
Modal auxiliary verbs (such as can, could, may, might, must, shall, should, will, would) express necessity, permission, obligation, or possibility. Option D contains the modal verb "must", which expresses strong obligation, making it the correct choice.