--- Who ______ it be that is singing in the next room?
--- It _______ be Lucy, but I am not sure.
A.can ; may | B.may ; can | C.can; must | D.must; may |
推荐套卷
--- Who ______ it be that is singing in the next room?
--- It _______ be Lucy, but I am not sure.
A.can ; may | B.may ; can | C.can; must | D.must; may |