1) Our teacher doesn't like mobile phones. We __________________ switch them off during lessons. a) don't have to b) shouldn't c) have to d) has to 2) I can hear you very well. You ____________ shout! a) must b) don't have to c) should d) mustn't 3) If you feel tired, you ____________ go to bed and sleep. a) should b) must c) has to d) don't have to 4) if you have a stomachache, you _________________ eat candies! a) don't have to b) must c) shouldn't d) should 5) Stop! You __________ drink that, that's alcohol!!! a) should b) don't have to c) mustn't d) shouldn't 6) There are sharks, you _____________ swim there. a) mustn't b) don't have to c) shouldn't d) must 7) Your bedroom is a mess! You _____________ tidy up. a) has to b) doesn't have to c) have to d) don't have to 8) It's cold outside, you _____________ wear a jacket. a) should b) must c) don't have to d) has to

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