316.fill out(=fill in)填写

　　317.set the world on fire=set the flames on fire(=do sth. remarkable)有突出成就

　　318.play with fire(=take great risks)干冒险事

　　319.set sth. on fire(=set fire to sth.)使..着火，放火

　　320.at first sight(=when first seen)乍一看，一见

　　321.for the first time 第一次 (作状语)

　　322.in the first place 首先，第一

　　323.fit into 刚好放入

　　324.fit in with(=suit，fall into agreement)合适，相配，一致

　　325.(be)fit for(=right and suitable for)适合

　　326.focus on(=concentrate on)集中在…上;focus sth. on把…集中在…上