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19. Harry has been reading all day -he ______ be tired.

 A. should             B. has got to         C. has to                 D. must

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18. Our teacher demanded our report ________ before five.

A. must be handed in      B. be handed in

C. should hand in          D. need be handed in

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17. ---Catherine, I have cleaned the room for you.

---Thanks. You_____ it. I could manage it myself.

 A. needn’t  do          B. needn’t  have done                          C. mustn’t  do       D. shouldn’t  have done

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16.-Where is my cell phone? I can find it nowhere.

-You it stolen while on the bus.

A. must have                B. should have had

C. may have had             D. can have

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15. She suffered a mental disease for quite some time and in the end she _____ go into a mental hospital.

 A. had to              B. must                  C. would like to           D. could

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14. - Finally I got to my grandmother’s home on foot.

- Really? You _______ a ride there.

A. must have taken      B. could have taken

C. shouldn’t  have taken                                                 D. couldn’t  have taken

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13. Since you have come so far with your experiment,you carry it through to the end.

A. may                B. might                 C. may well               D. may as well

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12. – Lucy doesn’t  mind lending you her dictionary.

-- She ______ . I've already borrowed one.

A. can't                 B. mustn't               C. needn't               D. shouldn't

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11. Jack’s ill, so they ______ change their plans.

 A. must              B. should                C. have got to            D. ought to

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10. Excuse me, six, Mr. White has arrived.        he wait outside or just come in ?

A. Shall                 B. May                  C. Could                 D. Must

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