62. feed (sb.) on sth. 靠吃…, 用…喂养
63. be fed up with(=be unhappy, tired about sth. dull) 厌烦, 腻了
64. feel like (=have a desire for) 想要
65. fill in 填写
66. fill out ( =fill in )填写
67. set the world on fire=set the flames on fire(=do sth. remarkable)有突出成就
68. play with fire (=take great risks)干冒险事
69. set sth. on fire(=set fire to sth.)使..着火,放火
70. at first sight(=when first seen)乍一看,一见
71. for the first time 第一次 (作状语)
72. in the first place 首先, 第一
73. fit into 刚好放入
74. fit in with ( = suit , fall into agreement) 合适, 相配, 一致
75. (be) fit for (=right and suitable for) 适合
76. focus on (=concentrate on) 集中在…上
focus sth. on 把…集中在…上
77. be fond of 喜欢
78. (be) in force 有效 , 实施