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 I ______ pay Tom a visit, but I'm not sure whether I will have time this Sunday.
    A. should          B. might          C. would         D. could

 - 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  

 "The interest ______ be divided into five parts, according to the agreement made
by both sides," declared the judge.
    A. may            B. should        C. must           D. shall

 Children under 12 years of age in that country______ be under adult supervision
when in a public library.
    A. must            B. may         C. can             D. need

 -Who is the girl standing over there?
    - Well, if you ______ know, her name is Mabel.
    A. may            B. can          C. must           D. shall

 You might just as well tell the manufacturer that male customers_____ not like the design of the furniture.
    A. must           B. shall          C. may           D. need

 If I _____ plan to do anything I wanted to, I'd like to go to Tibet and travel
through as much of it as possible.
    A. would        B. could       C have to          D. ought to  

 Helen _______ go on the trip with us, but she isn't quite sure yet.
    A. shall       B. must       C. may        D. can

 - I've taken someone else's green sweater by mistake.
    -It ______ Harry's. He always wears green.
    A. has to be        B. will be         C. mustn't be        D. could be   

 - The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
   -Oh, dear! She ________ a lot of difficulties!
   A. may go though                     B. might go through
   C. ought to have gone through         D. must have gone though