昨天我们是正式入园做志愿者的第一天，虽然加上培训和试运行已经是第五次进入世博园区了，虽然知道又会是辛苦劳累的一天。但服……

Dear Sue, I am writing to express my heart felt gratitudeto you for your kindest help when I was involved in that terrible trafficaccident. 亲爱……