find： to discover unexpectedly or by chance

　　I have not yet found the key I lost three days ago . 我没找到三天前掉的钥匙。

　　find out： to discover through examination or enquiry

　　We must find out the truth about the matter. 我们必须找出事情的真相。

　　18.All skills require constant repetition to become second nature ； good manners are no exception . 一切技能都需要经常反复而后才能成为第二天性，礼貌也是如此。

　　If you want to acquire a skill， you have to practice it again and again. It is the same with good manners， which you won't acquire unless you practice them constantly.

　　second nature： something you have done so often that you do it almost without thinking. 第二天性、习性

　　It has become a second nature to him to turn off all the lights before leaving the office. 离开办公室前把所有的灯都关了已成为他的习惯了。

　　be no exception…is included in…不看成是例外，同样适用

　　All residents must obey these traffic regulations. High-ranking officials are no exception.所有居民都要遵守这些交通规则。高级官员也不例外。

　　All men between 18 and 35 without exception are expected to serve in the army.所有18到35岁的男人，都要服兵役，没有例外。

　　19…。to concentrate on your performance in a specific area for about a week. （ …… ）就是在一个星期左右的时间内，集中改进你在某一方面的具体表现。

　　You can begin by guarding against one bad type of manner for about a week.

　　concentrate…on…把……集中在……

　　Don't be absent-minded. Please concentrate your attention on the experiment.别开小差。把注意力集中在实验上。

　　20.Or driving a car， why not watch yourself sternly for aggressive driving… 或是改进开车的举止，你可以严格监视自己是否开起车来很霸道 ……

　　Why not…？用来提建议

　　It's a fine day. Why not go to the Fragrant Hill？ 天气很好。我们干吗不去香山？ But why not write to Bob for help？干吗不给鲍勃写信请他帮帮忙？

　　watch ******************./oneself/sth. for ： to pay attention to sth. so that you notice it either

　　because you don't want to mi

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