Kristin,, my 17-year-old niece, had just gotten her driver'slicense and offered to take her mom's car to the gas station. Shepulled up to the full-service pumps, and the attendant asked, "Whatgrade, miss?"

哪一级我的十七岁的侄女，科里斯蒂，刚刚拿到驾照。她主动提出去加油站给她妈妈的车加油。她把车开到昼夜服务的加油泵前。服务员问她：“（加油加到）哪一级，小姐？”