1) You _____ drinking milk.  a) must b) mustn't 2) We ____ talk in the lesson. a) must b) mustn't 3) You _____ spend too many hours on the computer. a) must b) mustn't 4) You are sick. You ______ stay in bed. a) must b) mustn't 5) You are sick. You _____ take a pills. a) must b) mustn't 6) You _____ be late for lessons. a) must b) mustn't 7) You ______ visit your dentist regularly. a) must b) mustn't 8) It's 11 o'clock at night. You ______ play loud music. a) must b) mustn't 9) You ______ clean room. a) must b) mustn't 10) You have a cold. You _____ take a syrup. a) must b) mustn't

must / mustn't

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