51.arise from 由引起

52.arrange for sb./sth. to do sth. 安排做

53.arrive on到达;arrive at 到达某地(小地方);得出,作出;arrive in 到达某地(大地方);

54.be ashamed of 以为羞耻

55.assure sb. of sth. 向保证,使确信

56.attach 缚,系,结

57. make an attempt at doing sth. 试图做

58.attend to 注意,照顾;attend on 伺候,照料

59.attribute to/ toward 对的态度、怎么看

60.attributeto 把归因于,觉得是的结果

61.on the average 平均

62. aware of 意识到,了解