Answer: B) You must not use phones in class.
Explanation for this question is being written.
Answer: D) Must
Answer: E) Must
Answer: B) To feed.
Answer: C) Obligation
Answer: D) Mustn't
Answer: B) Mustn't
Answer: B) Must
Answer: C) Must not.
Answer: A) Must
Answer: A) MUST
Answer: A) True
Answer: C) Must
Answer: C) You mustn't turn right.
Answer: A) Obligation
Answer: A) Provide a copy after they sign a release.
Answer: A) Must be.
Answer: D) Must not eat.
Answer: A) Mustn't
Answer: D) Must have / to be able to keep.
Answer: B) Be
Answer: B) The tour guide says that we mustn't throw rubbish.
Answer: C) C
Answer: A) Call the FMS Office before 9:00 a.m.
Answer: D) You mustn't step on the grass in this area.
Answer: A) Eat, talk.