17. on no account(=in no case，for no reason)绝不要，无论如何不要(放句首时句子要倒装)
18. accuse…of…(=charge…with;blame sb. for sth.;blame sth. on sb.;complain about)指控，控告
19. be accustomed to(=be in the habit of，be used to)习惯于
20. be acquainted with(=to have knowledge of)了解;(=to have met socially)熟悉
21. act on奉行，按照…行动;act as扮演;act for代理
22. adapt oneself to(=adjust oneself to)使自己适应于
23. adapt…(for)(=make sth. Suitable for a new need)改编，改写(以适应新的需要)
24. in addition(=besides)此外，又，加之
25. in addition to(=as well as，besides，other than)除…外
26. adhere to(=abide by，conform to，comply with，cling to，insist on，persist in，observe，opinion，belief)粘附;坚持，遵循
27. adjacent(=next to，close to)毗邻的，临近的
28. adjust……(to)(=change slightly)调节;适应;
29. admit of(=be capable of，leave room for)…的可能，留有…的余地
30. in advance(before in time)预告，事先