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Correct Answer: C) Mustn't.
Correct Answer: C) Must.
Correct Answer: A) Modals.
Correct Answer: D) Should.
Correct Answer: B) Oughto.
Correct Answer: A) Ought to.
Correct Answer: B) Allowed to.
Correct Answer: B) Must.
Correct Answer: C) We're not allowed to.
Correct Answer: D) Need to.
Correct Answer: A) Must.
Correct Answer: C) CAN.
Correct Answer: C) Must have.
Correct Answer: A) Need.
Correct Answer: D) Couldn't.
Correct Answer: D) Have to be.
Correct Answer: B) Shouldn't.
Correct Answer: A) Could.
Correct Answer: B) Should.
Correct Answer: A) Should.
Correct Answer: B) Have to.
Correct Answer: B) Can.
Correct Answer: C) Can.