51、arise from(=be caused by) 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 (=feel shame，guilt or sorrow because of sth. done) 以… 为羞耻
55、assure sb. of sth. (=try to cause to believe or trust in sth.) 向…保证，使…确信。
56、attach(to)(=to fix，fasten;join) 缚，系，结
57、make an attempt at doing sth. (to do sth.) 试图做…
58、attend to (=give one's attention，care and thought)注意，照顾;attend on(upon)(=wait upon，serve，look after) 侍候，照料
59、attitude to toward …对…的态度。看法
60、attribute…to…(=to believe sth. to be the result of…)把……归因于……，认为……是……的结果