True: You must drink water every day., People mustn't drive too fast., You must be nice to other people., We must try to smile and laugh every day., We must try to make the world better., You mustn't play in the street., You must breathe., We mustn't be mean to people., False: Students must sleep in class., We must speak Chinese in English class., You mustn't use scissors carefully., You mustn't do what your dad tells you., We must eat hamburgers every day., You must wear the same clothes every day., We mustn't sleep sometimes.,

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