Answer: A) Must not.
Explanation for this question is being written.
Answer: B) Must
Answer: B) Mustn't
Answer: C) Must
Answer: C) We don't have to send her a Christmas card.
Answer: D) Must
Answer: B) FALSE
Answer: A) Must
Answer: A) Mustn't
Answer: A) Must return.
Answer: B) You must wear your seatbelt.
Answer: A) True
Answer: A) Mustn't throw rubbish in the national park.
Answer: B) False
Answer: A) Go
Answer: B) Don't have to.
Answer: A) Prohibition
Answer: D) Can't
Answer: A) Mustn't they?
Answer: C) We must arrive before 9am.
Answer: A) You must finish your homework.
Answer: C) Mustn't
Answer: B) Must report it.
Answer: A) Bella must join the event.
Answer: A) You must stop at the red light.
Answer: D) Don't have to.
Answer: D) Mustn't