1)Excuse me,but are you Mr O'Brien ?2)Oh,I'm sorry, John.I didn't mean to stand on your foot3)"The music's so loud in here,isn't it ?""Pardon me?I can't hear what you're saying".2.Fill in:must(n't),should(n't),need(n't),can('t).1)You mustn't enter this area.It's forbidden.2)It's too sunny.I should/must put on my sunglasses.3)I think the government must do more to help the poor.4)this is a secret.You mustn't tell anyone5)We've got plenty of time.We needn't hurry6)Youmustn't/shouldn't touch these wires.It's dangerous7)Everything's fine .You needn't worry8)You shouldn't eat so many sweets.They're bad for you9)This skirt isn't dirty.You must wash it10)We can't play tennis here.It's for members only.