MUST: return your library books on time, study for your exams, change your shoes, be on time , take your medicine, feed the dog, put the rubbish in the bin!, MUSTN'T: use your mobile in class, drop litter, cheat in tests, run in the corridor, smoke, speak loudly in the library, forget about Mother's Day!,

MUST or MUSTN'T - rules

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दृश्य शैली

विकल्प

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