—Someone is knocking at the door. Who __
题型:选择题
问题:
—Someone is knocking at the door. Who ______ it be?
—It ______ be Tom. He is still in the school.
A.may; can’t
B.can; mustn’t
C.might; couldn’t
D.could; may not
—Someone is knocking at the door. Who ______ it be?
—It ______ be Tom. He is still in the school.
A.may; can’t
B.can; mustn’t
C.might; couldn’t
D.could; may not