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Correct Answer: A) Might.
Correct Answer: A) A must.
Correct Answer: D) Had to.
Correct Answer: A) Present and future.
Correct Answer: C) Can.
Correct Answer: B) That someone is not allowed to do something.
Correct Answer: A) May.
Correct Answer: B) Can.
Correct Answer: C) Should.
Correct Answer: D) May.
Correct Answer: A) Shouldn't.
Correct Answer: A) Don't have to.
Correct Answer: B) Must.
Correct Answer: C) Obligation.
Correct Answer: B) Must have been studying.
Correct Answer: B) May.
Correct Answer: D) Should.
Correct Answer: A) Must.
Correct Answer: A) I could sing when I was a little girl.
Correct Answer: D) Couldn't.
Correct Answer: C) Can not.
Correct Answer: A) Have to.
Correct Answer: B) Should.
Correct Answer: C) Must.