1) You .............wash  your teeth ,after every meal. a) must b) mustn't 2) I ........... go to bed earlier. a) must b) mustn't 3) You ...........  drink wine. a) must b) mustn't 4) You ............ answer all the questions. a) must b) mustn't 5) ............ study a) must b) mustn't 6) I ........... run. a) must b) mustn't 7) You ............... do your homework. a) must b) mustn't 8) He ............... sleep during  the class. a) must b) mustn't 9) She................ wait. a) must b) mustn't 10) You ...............  smoke . a) must b) mustn't 11) He.............. stop. a) must b) mustn't 12) Cars  ..............   park in from of  the entrance. a) must b) mustn't 13) Children  ................. talk to strangers. a) must b) mustn't

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