1) My grandmother is eighty-five, but she ________ still read and write without glasses. a) must b) don't have to c) can 2) You _________ not lose any more weight. You are already slim. a) should b) have to c) can 3) George has traveled a lot. He __________ speak many languages. a) should b) mustn't c) can 4) I can hear you quite well. You ________ shout. a) don’t have to b) mustn’t c) can’t 5) She __________ eat so much chocolate because it's bad for her figure. a) doesn’t have to b) must c) shouldn’t 6) I __________ understand him. He should speak louder. a) mustn’t b) don’t have to c) can’t 7) It's later than I thought. I __________ go now. a) must b) has to c) need 8) Smoking is very unhealthy. You __________ stop it. a) can b) don’t have to c) must 9) You _________ vacuum the carpets because Carol has already done it. a) must not b) don’t have to c) should 10) He _________ come to my party because he is ill. a) can’t b) should c) must 11) It's very cold today. Do you think it __________ snow later? a) should b) may c) must 12) You _________ leave your door unlocked when you go out. a) mustn’t b) have to c) can 13) You don't ________ pick me up at the station. I can get a taxi. a) must b) need c) have to 14) The shirt is not dirty. You _______ wash it. a) mustn’t b) can c) don’t need to 15) Don't tell anyone what I said. You __________ keep a secret. a) can’t b) must c) shouldn’t 16) I _______ go to the pub tonight. I have to study. a) should b) must c) can't 17) You have a cold, so you _______ stay at home. a) mustn't b) should c) can't 18) The businessman from the USA spoke so fast that I ________ understand him. a) can b) shouldn't c) couldn't 19) I understand. You _________ explain it to me again. a) don't have to b) must c) mustn't 20) We've got plenty of time . You ________ hurry. a) must b) don't have to c) should

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