1. in fashion(=stylish, most modern)时兴,流行 2. after the fashion (of) 依照… 3. find fault with(=complain about. criticize)找毛病，对…吹毛求疵 4. at fault (=in the wrong, blamable)有错 5. in favour of 赞成 6. be in favour with 受宠, 受偏爱. out of favour with 失宠, 不受宠 7. in one’s favour(=to one’s advantage)对.有利 8. (be) favourable to(=advantageous)有利的 9. fear for (=be afraid for the safety of sb. or sth.) 为…担心 10. for fear of (=in case of. because of anxiety about) 以防, 由于怕 11. in fear of (=afraid for the safety of) 担心 12. feed (sb.) on sth. 靠吃…, 用…喂养 13. be fed up with(=be unhappy, tired about sth. dull) 厌烦, 腻了 14. feel like (=have a desire for) 想要 15. fill in 填写 16. fill out ( =fill in )填写 17. set the world on fire=set the flames on fire(=do sth. remarkable)有突出成就 18. play with fire (=take great risks)干冒险事 19. set sth. on fire(=set fire to sth.)使..着火,放火 20. at first sight(=when first seen)乍一看,一见