29. a word of English origin　 源于英语单词　　　 a man of noble origin 一个出生高贵的人

the original edition 原版　　 an original birth certificate　 出生文件证明

28. the ordinary people 平凡的人　　　 ordinary -looking 长得一般

We were dressed up for the party but she was still in her ordinary clothes.　 日常装束

27. order　 命令,秩序,订购,点,订购　 The orders are that we should stay here.

in order to ,　 in order that　 be in order　 be out of order　 place an order for　 order sb to do　　 order that sb should do　 　order a portion of steak 点一份肉排　 　order ten tons of sugar

an orderly room　 整齐的　　　　 an orderly mind　 有条理的头脑　

26. or so 等等　 sooner or later 迟早

25. We opposed the plan because of the cost.　 反对该计划因为…

be the opposite of　　 …对立面　　　　 Black is the opposite of white.

be opposite to　　 与…相对的　　 Black is opposite to white.

The house is opposite the road.　 (on the other side of)

24. have the opportunity to do/ for/of doing　 有去做…机会　

23. What's your opinion of the book ? = How do you like the book ?=What do you think of the book?　 have a good/poor opinion of 对…印象好/坏 in one's opinion = to one's mind 据…看来

22. operate the machine 开动机器　　 operate on sb　 给某人动手术　　

perform an operation on sb　 come into operation = come into effect = come into force 开始生效

21. The door won't open.门不能开。　 open an account 开个账户　 leave the door open 让门开着　 declare sth open　 宣布…开始 be open to the public　 对公共开放opening speech 开幕词

20. only　　 仅仅　　 Only he saw the tiger.　 He only saw the tiger.　　 He saw only the tiger.

Only in this way can you do it well.　　　　 not only… but also…　　 too…to…

only too...to = very　　 I am only too glad to meet you.