填空题

Americans think a great deal about time. From childhood they learn to value time. As (11) , they are taught to be on time to go to school, to do work and to do everything. When they are having a good time, they say that (12) . When a person is dying, they say he is living in on borrowed time. Time is money. Time is knowledge. Time is (13) in America. A working American has to work hard for 8 hours a day or 40 hours a week. This is the working time. In his (14) time, he also works hard for more money. Every Saturday and Sunday are filled with activities. In the street you can hardly see a man who walks slowly. They walk very (15) . In fact, they are running.