1) You ___________ listen to the teacher. a) must b) can 2) We're going to the zoo! We ___________ take photos here. a) must b) can 3) You __________ throw rubbish on the ground. a) mustn't b) couldn't 4) You __________ use so much paper. a) shouldn't b) can't 5) You _________ save electricity by turning off lights. a) must b) should c) can 6) If you go to Antarctica, you _________ take your coat. a) can b) should c) must 7) You __________ feed the animals in the zoo. a) Mustn't b) Shouldn't c) Can't 8) You ___________ wear a uniform in this school. a) ought to b) have to c) can 9) You _____________ eat so many cakes. Sugar is bad for you. a) shouldn't b) don't have to c) couldn't 10) You _____________ bring your dog into in school! a) mustn't b) can't c) shouldn't

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