—Who______ it be that is knocking at the door?  

   —It ______ be Father, but I’m not sure.

   A. can; must         B. can; may          C. must; can            D. may; must

When we were young, every evening my brother and I ______ stay at home waiting for our mother.

   A. would              B. might             C. should                 D. could

--- I don’t care what people think.

--- Well, you __________. People’s idea is of great value to you.

A. could                     B. would                    C. should                    D. might

-- Hi, Tom. Any idea where Jane is?

   --- She ______ be in the classroom. I saw her there just now and she said she wouldn’t go anywhere.

  A. must                   B. may                            C. can                        D. should

It’s already 11 o’clock and nobody answers the phone. George ________ asleep now.

       A. must be             B. must have been        C. should be                 D. should have been

--- It’s already 9:00 o’clock, but he hasn’t turned up yet. 

   --- He ______ in the traffic jam.

       A. could have caught                         B. should have caught

       C. must catch                                           D. would have caught

--- I don’t mind telling you what I know.

   --- You _________ . I am not asking you for it.

       A. mustn’t                   B. can’t                C. needn’t             D. should not

--- I’ll tell Mary about her new job tomorrow.

   --- What? You ______ her last week.

       A. ought to tell             B. must have told  C. might have told  D. should have told

“Whatever you want, you ____ have it so long as you get the best result,” said the boss.

A. would                            B. ought to                  C. shall                        D. could

---Who can it be that hasn’t handed in his composition?

---It ______ be Robinson. He ______ it in yesterday.

A. will; should hand                                       B. must; should have handed

C. may; can’t hand                                              D. can; could have handed