----Who______ it be that is knocking at the door?
----It ______ be Father, but I’m not sure.
A.can; must | B.must; can | C.can; may | D.may; must |
推荐套卷
----Who______ it be that is knocking at the door?
----It ______ be Father, but I’m not sure.
A.can; must | B.must; can | C.can; may | D.may; must |