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