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Correct Answer: C) Couldn't.
Correct Answer: D) Must have.
Correct Answer: B) Mustn't.
Correct Answer: D) Permission and ability.
Correct Answer: B) Can't.
Correct Answer: B) Possibility.
Correct Answer: A) Must.
Correct Answer: C) Obligation.
Correct Answer: C) Might.
Correct Answer: A) Obligation.
Correct Answer: C) Can't.
Correct Answer: B) Have to.
Correct Answer: C) Must.
Correct Answer: A) Could.
Correct Answer: B) Doesn't have to.
Correct Answer: A) Can _____ can.
Correct Answer: D) Must.
Correct Answer: A) Must not.
Correct Answer: A) Have to.
Correct Answer: B) Musn't.
Correct Answer: B) May.