Answer: A) Must
Explanation for this question is being written.
Answer: C) Must
Answer: B) Need to/ must/ have to.
Answer: B) Mustn't
Answer: C) You mustn't use red ink in the exam.
Answer: A) A
Answer: D) Mustn't
Answer: C) Obligation
Answer: D) With each new fill and refill.
Answer: A) Aren't supposed to.
Answer: A) True
Answer: C) Mustn't
Answer: A) Must be reviewed.
Answer: A) Must and has to.
Answer: D) Must
Answer: D) A must.
Answer: B) Must
Answer: B) Obligation
Answer: A) Mustn't
Answer: B) Prohibition
Answer: A) Musn't
Answer: A) Prohibition
Answer: B) Interrupt
Answer: D) Doesn't teach.
Answer: B) Must work.
Answer: A) Walk