A) could B) can C) may
A) might B) must C) can
A) might B) must C) can't
A) should B) must'nt C) could
A) ought to B) shall C) must'nt
A) must B) might C) can't
A) might B) may C) should
A) can B) can't C) may
A) may B) can C) must
A) might B) can't C) mustn't |