1) We ________________ use our mobile phones for too long, it's bad for the eyes! a) couldn't b) don't have to c) mustn't 2) _______________ you help me with these bags, please? a) could b) should  c) must 3) We ______________ study more if we want to pass our exams. a) can b) must c) might 4) You don't look happy: I think you ________________ change your job. a) should b) don't have to c) can't 5) _________________ you lend me your tablet? Mine isn't working. a) must b) might c) could 6) I ______________ play football very well. a) mustn't b) shouldn't c) can't 7) We __________go to school on Monday. It's a holiday. a) don't have to b) mustn't c) shouldn't 8) We ________ pay for the tickets. Mum is going to pay for them. a) might not b) don't have to c) mustn't 9) _________ I borrow your pen, please? Mine isn't writing. a) should b) could c) must 10) Students __________ talk during the test. a) couldn't b) mustn't c) don't have to 11) Have you ever been to Spain? No, I haven't, but I ___________ go next year. a) can b) might c) mustn't

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