You bought something,didn't you?Everyone should obey the traffic rules,shouldn't he?I am not in your group,am I?I join in your group,don't I?Lucy and Lily must be at school,mustn't them?I don't think they will come back to visit me,do they?Those children nearly never learned English,did they?No one stays at school after class,does he?Lucy used to eat lunch at school,didn't she?The weather is fine and let the children play on the playground,isn't it?个人意见
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