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Correct Answer: C) Can't.
Correct Answer: C) Must.
Correct Answer: A) Might have.
Correct Answer: D) Is supposed to (this is not a modal verb).
Correct Answer: B) Can.
Correct Answer: C) Could.
Correct Answer: A) Can't.
Correct Answer: D) Can.
Correct Answer: B) May have caused.
Correct Answer: C) Advice.
Correct Answer: C) Can.
Correct Answer: C) Had to.
Correct Answer: C) Mustn't.
Correct Answer: B) A possibility.
Correct Answer: B) Could perform.
Correct Answer: B) Must.
Correct Answer: C) Could have won.
Correct Answer: A) Could.
Correct Answer: C) Will.
Correct Answer: D) I couldn't swim when I was a kid.
Correct Answer: A) Must.