助动词和情态动词
并请说明原因
1."The interst____be divided into five parts,according to the agreement made by both sides,"declared the judge.
A.may B.should C.must D.shall
2.--I'll tell Mary about her new job tomorrow.
--You____her last week.
A.ought to tell B.would have told C.must tell D.should have told
3.--Who is the girl standing over there?
--Well,if you ____know,her name is Mabel.
A.may B.can C.must D Shall