1. Who is responsible for the building´s maintenance? 谁负责这座大楼的保养事宜?
2. Two years ago, a 15-member team at the 115-year-old teaching hospital, under pressure to cut costs from a health maintenance organization (HMO), was given permission by the hospital's top manager to find a way to get the tube removed sooner. 两年前，出于一家保健组织（HMO）要求减少成本的压力，这家有115年历史的教学医院组建了一支15人小组，他们得到医院总经理的许可来研制一种方法，以便尽早去掉导管。
3. "In older people, an exercise program appears important for brain maintenance," says Daniel M. Landers, professor of exercise science at Arizona State University, 亚利桑那州立大学的运动学教授丹尼尔·M. 兰德斯说，"对老年人来说，锻炼计划对维持大脑功能似乎非常重要。"