Task 3. fill in the gaps with must or mustn’t 1. you … eat inside the gallery. 2. you … be quite in the library. 3. we … feed the animals at the zoo. it is very dangerous. 4. we … take pictures. it is bad for the paintings. 5. you … leave by 6 o’clock or you’ll be late. 6. you … interrupt your teacher when she is speaking. 45

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