17.at present 现在；目前
18.to toss a coin 掷硬币（以猜其正反面）；（与某人）掷硬币以作决定
19.with a vengeance 1.猛烈地； 2.过度地
20.on occasion 有时，间或
21.to sit down on 反对
22.in vain 无效地；无结果地；徒然
23.to go to hell 见鬼去（骂人用法）
24.to rob sb.of sth. 抢某人之财物
25.in series 串联电路的；成串联的
26.with a view towards（或to） 以…为目的
27.to take a free ride 免费搭车
28.How come……？ 怎么会…？
重点词汇：
1.tighten ： v（使）变紧，拧紧
派生词：tight a. 紧的
eg：As he struggled ， the ropes tightened even more. 他越挣扎，绳子便绑得越紧。
Are there any plans to tighten control of advertising？ 有没有什么加强广告管理的计划？
2.excessive ： a. 过多的，过分的
派生词：exceed v. 超过，超出；excess n. 超越
eg：Excessive exercise can sometimes cause health problems. 过多的锻炼有时也可能带来健康问题。
Excessive drinking is harmful to your health. 酗酒对你的身体有害。
3.competition ： n. 竞争，比赛
派生词：compete v. 竞争，比赛
4.encounter ： to come across v. 遭遇，遇到
eg：The army is reported to be encountering considerable resistance in some remote rural areas. 据报道部队在某些偏僻的乡村遇到了相当大的抵抗。
When did you first encounter these difficulties？ 你最初遇到这些困难是在什么时候？
5.disapproval ： n. 不赞成，不许可
派生词：approval 赞成，许可
eg：Although they said nothing ， she could sense their disapproval.
尽管他们什么都没说，但她能感觉到他们不赞成。
Phrases词组 ：
1.to take …easy 轻松一点；勿太紧张
eg：When confronted with difficult problems， take it easy and be patient. 碰到难题时要从容耐心。
2.to do one's best 尽全力；尽量
eg：I did my best to stop her. 我已尽全力阻止她。
3.to expect sth. of sb. 对某人抱有某种期望
eg：I can't finish this job by Friday， you expected too much of me. 我星期五以前干不完这项工作，你对我期望太高了。
4.in return ： 作为回报
eg：I bought him a drink in return for his help. 我请他喝酒以酬谢他的帮助。
5.so long as 假如，只要
eg：As long as it doesn't rain we can play. 只要不下雨，我们就能玩。
You can improve your oral English so long as you keep practicing. 你只要不断地练习，就能提高口语。
6.to apply oneself： 致力于，努力
eg：You will only pass your exams if you really apply yourself to your work. 你只有真正专心用功，考试才会及格。