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Correct Answer: B) Can.
Correct Answer: B) Could.
Correct Answer: A) Has to.
Correct Answer: B) Had better.
Correct Answer: C) Mustn't.
Correct Answer: B) Have.
Correct Answer: B) False.
Correct Answer: D) Have to.
Correct Answer: B) Has to.
Correct Answer: B) Have to.
Correct Answer: D) Don't have to.
Correct Answer: A) Obligation.
Correct Answer: D) Could.
Correct Answer: D) Should.
Correct Answer: A) Auxiliary Verbs.
Correct Answer: C) Must.
Correct Answer: B) Shouldn't.
Correct Answer: B) Advice.
Correct Answer: A) Ability.
Correct Answer: A) Don't have to.
Correct Answer: D) Mustn't.
Correct Answer: C) Shall.
Correct Answer: A) Have to.
Correct Answer: D) Sorry, I can not.