6choose the correct words.1 in britain, students must / don't have toleave school when they are 16. some stayuntil they're 18.2 we have to / shouldn't be quiet in thelibrary.3 she can take the exam again next year.she must/ shouldn't be upset.4 students should / mustn't work hard atschool to get good marks.5 we shouldn't / must go to all of our lessons.6 my school shouldn't / mustn't have so manyrules. it's too strict.​