1) You ..................... to feed the dog, I've already done it. a) mustn't b) can't c) don't have 2) Look at the sign! You ............. take photos in the gallery. a) mustn't b) don't have to c) have to 3) I ............. study hard if I want to pass the exam. a) can't b) can c) mustn't d) have to 4) I ............ to finish this task today. It's in the contract. a) must b) have c) can d) has 5) You .............. smoke in the hospital. a) mustn't b) don't have to c) have to 6) I've already phoned Jane, you ........... do it again. a) must b) don't have to c) mustn't

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