Answer: B) You mustn't/can't talk on the phone while you're driving.
Explanation for this question is being written.
Answer: A) Must
Answer: B) You must exercise regularly.
Answer: B) Must take.
Answer: A) Mustn't
Answer: B) Mustn't
Answer: A) Throw
Answer: D) No, but most require some type of job training or test.
Answer: A) Must not.
Answer: A) Prohibition
Answer: C) Do
Answer: A) Must be delivered.
Answer: A) Must, won't.
Answer: A) Behave
Answer: A) Feed
Answer: C) Must
Answer: D) Must
Answer: D) Mustn't
Answer: B) Must
Answer: A) Have
Answer: C) Mustn't
Answer: B) Mustn't/may
Answer: C) Obligation
Answer: B) Obligation
Answer: B) The writer is going to do a lot of research.
Answer: C) You must.
Answer: C) Must not.
Answer: B) You mustn't cheat in the exam.
Answer: B) No, it's being used here as a modal of obligation.
Answer: B) You must work hard.
Answer: C) Mustn;t
Answer: A) MUST
Answer: B) She mustn't enter the premises.