1) You liked the film?! You _______ be serious - it was terrible! a) might b) must c) can't 2) I don't know. Ask Andrew, he ________ know the answer. a) may b) can c) have to 3) They ________ be away for the weekend, but I'm not sure. a) should b) might c) have to 4) I haven’t eaten all day. You _________ be hungry. a) can't b) may c) must 5) Where’s Irene? I’m not sure. She _________ be in the kitchen. a) could b) must c) don't have to 6) You really ________ go and see a doctor about your cold. a) have to b) should c) might 7) That's the second new car they have bought this year. They __________ be very rich! a) must b) have to c) don't have to 8) He's working full-time and studying at the University. That ______ be easy. a) can't b) may c) mustn't 9) Look at that guy's big muscles. He ______ work out a lot. a) can b) must c) should 10) Wow - look at that diamond necklace. It ______________ cost a fortune! a) must b) might c) has to 11) Do you _________ wear a tie to school? a) must b) have to c) should 12) You ______ see the Statue of Liberty when you're in New York! a) may b) have to c) must 13) We _______ make any noise; the baby's sleeping. a) must b) mustn't c) should 14) You ________ forget your umbrella. It’s going to rain. a) don't have to b) mustn't c) must 15) The ZOO is free on Sundays. You __________ pay to get in. a) mustn't b) have to c) don't have to 16) If Susan said that, it ______ be true. She never lies. a) might b) could c) must 17) I ________ pack my bags. The flight is in 2 hours. a) ought to b) shouldn't c) have to 18) Students _________ listen to the teacher to understand the subject. a) shouldn't b) must c) have to 19) You __________ go shopping today. I've already done it. a) don't have to b) have to c) mustn't 20) We ___________ feed the animals. It’s forbidden. a) should b) mustn't c) might

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