1) Students ... wear uniforms at school. a) can b) should c) have to 2) You ... sweep the floor. I have already done that. a) can't b) don't have to c) mustn't 3) You... do more sport if you want to loose weight. a) must b) should c) can 4) John missed his bus yesterday and he... wait for the next one. a) could b) had to c) did must 5) I need your advice. .... I tell them the truth? a) Must b) Should c) Have to 6) It's a great book. You... read it!!! a) must b) have to c) shouldn't 7) Tom is lucky. He... wake up early on Mondays, he starts work at 11 a.m. a) doesn't have to b) mustn't c) shouldn't 8) You ...be an expert to use the basic functions of this program. a) mustn't b) don't have to c) shouldn't 9) You ... park here. It is an emergency exit. a) mustn't b) don't have to c) shouldn't 10) I ... speak Chinese. It's too difficult. a) can't b) mustn't c) don't have to 11) We ... take photos inside: it is not forbidden. a) should b) must c) can 12) I don't think we ... take this road. It is not on my map. a) can b) must c) should 13) You look pale. You... sit down and drink a glass of water. a) can b) must c) should 14) The museum is free. You ... pay. a) mustn't b) don't have to c) can't 15) If you can't fall asleep, you ... drink coffee. a) mustn't b) shouldn't c) don't have to

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