1) You .......................... do your homework. a) must b) mustn't 2) You .......................... read carefully! a) must b) mustn't 3) You .......................... run in the street. a) must b) mustn't 4) You .......................... shout. a) must b) mustn't 5) You .......................... be polite.  a) must b) mustn't 6) You .......................... be quiet in class.  a) must b) mustn't 7) You .......................... make fun of people. a) must b) mustn't 8) You .......................... smoke. a) must b) mustn't

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