1) You ........... be loud in the library a) must b) mustn't 2) You ............. be kind a) must b) mustn't 3) Kids ................help parents a) must b) mustn't 4) You ..............drive when you are not 18 years old a) must b) mustn't 5) You ..............respect road signs a) must b) mustn't 6) You ............. smoke cigaretts when you are under 18 a) must b) mustn't 7) She .......... be home. I saw her on the balcony. a) must b) mustn't 8) Students ............run at the corridor. a) must b) mustn't 9) I .......... swim here, it's forbidden. a) must b) mustn't 10) They ..........be hungry because they have a lot of food in the basket. a) must b) mustn't

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