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Correct Answer: B) Must be.
Correct Answer: B) I'm sure you are tired.
Correct Answer: C) Should.
Correct Answer: C) Have to.
Correct Answer: A) That someone has to do something because of internal motivation.
Correct Answer: B) Not.
Correct Answer: A) I might have left.
Correct Answer: D) Have to.
Correct Answer: B) Should.
Correct Answer: B) Can.
Correct Answer: D) Can.
Correct Answer: D) Ought.
Correct Answer: A) Should.
Correct Answer: A) May.
Correct Answer: B) You mustn't park here.
Correct Answer: D) Had to.
Correct Answer: A) You ought to.
Correct Answer: B) Used to.
Correct Answer: B) Would.
Correct Answer: B) Could.
Correct Answer: C) Can.
Correct Answer: D) May.
Correct Answer: C) Must.
Correct Answer: B) I could have kicked him but I didn't.