a
a matter of time 时间问题
around the clock整天不断
as far as i know 据我所
a while back 不久以前
all along一直，始终
anything but 绝对不
at any time随时
achiless’heel 致命弱点
a rainy day不如意的日子
all thumbs 笨手笨脚的
ants in one’s pants/shirts坐立不安
a breeze小菜一碟
at no charge免费
all tied up工作很忙
as a matter of fact事实上
a long way off还差得远呢
a big fish in a small pond小地方的大人物
at somebody’s service愿意为某人效劳