1. a bit (of) 有一点儿
2. a couple of 两个；几个
3.a group of 一群
4. a kind of 一种； 一类
5. a lot of (lots of)=a number of 许多
6. a pair of 一双； 一副
7. a piece of "一(块,张,片,件)"
8. according to 按照；根据
9. after all "终究, 毕竟"
10. after school 放学后
11. agree with sb/to do.同意某人的意见/某事
12. all day (long) 整天
13. all over 到处
14. all right 行了；好吧；(病)好了
15. all the same "还是, 仍然"
16. all the time 一直
17. all the way 一路上
18. and so on 等等
19. apologize to sb. for sth. 为某事向某人道歉
20. arrive at / in a place 到达某地