281.in the twinkling of an eye 一眨眼，转眼间
282.keep an eye on(=keep a watch on)照看，监视
283.in the eyes of in one’s eyes(=in the judgment of)在某人看来，在某人眼里
284.on the face of it(=judging by what one can see)表面看来
285. in the face of 面对着(困难等情况)
286. in one’s face 当着某人的面;face to faced 面对面;face up to 大胆面向
287.fail in(=be unsuccessful in)失败
288.in good faith(=honestly，sincerely)真诚地
289.keep faith with 对…守信用
290.lose faith in 对…失去信心
291.on faith 毫无怀疑地，依赖地
292.faithful to(=loyal to)对…忠诚
293. fall into the habit(of)养成…习惯
294. fall short of(=fail to reach a desired result，standard，etc.)没达到，低于
295.familiar with 熟悉，了解
296. have a fancy for(=like sth. without the help of reason)(没有道理地)喜欢，想
要
297. take a fancy to(=become fond of)喜欢
298.by far 远，非常(与比较级或最高级连用)
299.far from 远远不是
300. far from 非但不…(而且)
