英语错误改正题；On the hall,students were happy to celebrate the 30th anniversary to Happy Valley School.They played games and won prizes .Some students had e bad to help them.With their helping hands,the
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Atthe hall,students were happy to celebrate the 30th anniversary of
Happy Valley School.They play games and won prizes .Some students had e to help them.With their helpul hands,the teachers could finish the decoration before the Open Day.