Answer: A) Must
Explanation for this question is being written.
Answer: C) Musn't
Answer: A) Mustn't
Answer: B) Must not.
Answer: D) Necessity
Answer: B) Mustn't
Answer: D) Must
Answer: B) It expresses an obligation.
Answer: B) Must
Answer: C) C
Answer: B) I must go.
Answer: C) Mustn't
Answer: B) Prohibited, not allowed.
Answer: D) Mustn't
Answer: C) Must
Answer: C) Yes, she's correct / musn't.
Answer: B) Deontic modal.
Answer: B) It implies necessity or obligation.
Answer: A) Be
Answer: A) True
Answer: C) Mustn't.
Answer: A) Must obey.