20. be acquainted with(=to have knowledge of) 了解; (=to have met socially　) 熟悉　­

19. be accustomed to (=be in the habit of, be used to)习惯于.　­

18. accuse…of…(=charge…with; blame sb. for sth. ; blame sth. on sb. ; complain about) 指控,控告　­

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)　­

16. on account of (=because of) 由于,因为.　­

15. account for (=give an explanation or reason for) 解释, 说明.　­

14. give sb. an account of 说明, 解释 (理由)　­

13. take…into account(=consider)把...考虑进去　­

12. on one’s own account　1) 为了某人的缘故, 为了某人自己的利益　2) (=at one’s own risk) 自行负责　3) (=by oneself)依靠自己　on account 赊账; on account of 因为; on no account不论什么原因也不;of …account 有…..重要性.　­

11. in accordance with (=in agreement with) 依照,根据　­