55.　　 as a result 结果，因此，由于

54.　　 as well as 也

53.　　 as soon as 一……就……

52.　　 as long as　 长达….

51.　　 as …as possible 尽量

50.　　 as usual 照常

49.　　 as …as 像……一样

48.　　 arrive at/ in到达某地

47.　　 all year round　 全年

46.　　 all by oneself 单独，独自