Several of the runners fell behind in the race. 有几个赛跑者在比赛中落后了。
　　association       n. an organized body of people who have an interest, an activity, or a purpose in common; a society  协会；社团
　　According to the American Automobile Association, since 1964 all cars sold in the United States have been equipped with seat belts.
　　根据美国汽车协会的资料,自从一九六四年以来在美国出售的所有汽车都装有保险带。
　　appropriate       adj. right  适合的；适当的
　　Choose the appropriate words from the list below.  从下表中选择适当的词。
　　postcode          n. 邮政编码
　　proficiency       n. the state or quality of being proficient; competence 熟练；精通
　　attain proficiency in spoken English   精通英语会话

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