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Correct Answer: A) Might.
Correct Answer: A) Have to.
Correct Answer: A) Might have.
Correct Answer: A) Necessity or possibility.
Correct Answer: B) I didn't have to know it.
Correct Answer: B) Could.
Correct Answer: A) Can't.
Correct Answer: C) Can't.
Correct Answer: A) Must.
Correct Answer: A) Would.
Correct Answer: B) Can.
Correct Answer: A) Obligation.
Correct Answer: D) Ought to.
Correct Answer: C) Don't have to.
Correct Answer: D) Don't need to.
Correct Answer: C) May I com in, please?.
Correct Answer: A) Should not/ might.
Correct Answer: D) Could.
Correct Answer: A) Had better.
Correct Answer: C) Must.
Correct Answer: C) Ought to.