Answer: B) An obligation.
Explanation for this question is being written.
Answer: C) Get
Answer: A) Must
Answer: C) Must
Answer: B) True
Answer: A) You must remove your shoes when entering a temple.
Answer: C) Have to.
Answer: C) Necessity
Answer: A) Mustn't
Answer: C) Send
Answer: B) Mustn't
Answer: C) Mustn't
Answer: B) Must
Answer: A) Mustn't(must not).
Answer: D) Remove 'to' after 'must'.
Answer: A) A
Answer: D) Mustn't
Answer: B) OBLIGATION
Answer: C) Disconnect the power source.
Answer: A) Strong personal obligation.
Answer: D) Must
Answer: A) Must buy.
Answer: B) MUST
Answer: C) Both A and B.
Answer: B) To take.
Answer: E) Mustn't
Answer: B) Certainty
Answer: A) Prohibition.
Answer: A) Must scrub.