1、O一、易写错词汇obtainvt. 获得obviousadj. 明显的occasionn. 场合October n. 十月Olympics/the Olympic Games 奥运会the Olympic spirit 奥运精神operan. 歌剧opinionn. 看法，观点oppositeadj. 对面的，相反的，对立的optimisticadj. 乐观的二、易错词汇变形objectadj. objective 客观的obligeadj. obliged 感激的observen. observation 观察n. observer 观察者obviousadv. obviouslyoccas
2、ionadj. occasional occurn. occurrence occupyadj. occupied 忙于的，被占用的n. occupation 职业，占领offendn. offence/offenseadj. offensive 无礼的，冒犯的officer adj. official 官员；官方的，正式的openn. opening 落成，开通，开幕式，机会operate n. operation 操作，手术n. operator 接线员organizen. organization 机构，团体，组织n. organizer 组织者，安排者originadj. origin
3、alweourselves 反身代词outn. outing 远郊，远足ownn. owner 拥有者n. ownership 所有权三、熟词僻义1. occur 熟义:发生 v. 被想到 A good idea occurred to me. = (hit, struck, came to)2. be well/ badly off经济状况好/坏 He is well off, it appears, and willing to work for nothing. 似乎他很富裕, 愿意白干。 来源:学。科。网3. object 熟义：物体,目标,宾语,对象生义：反对(与to连用)objec
4、t to the proposal.反对这个提议。4.operate 熟义：动手术,开刀(operate on sb/ sth)生义：操作operate a computer / machine(机器)工作.运转The lift doesnt operate properly.5.order熟义：命令;吩咐；次序;秩序； in (good) order状况良好，井然有序 生义：整齐，有条不紊地定购;预定Youd better order a taxi.你最好还是去预定一辆出租汽车。点（菜）；叫（菜）What drinks shall we order?我们叫什么饮料？正常(工作)状态 The
5、telephones out of order.电话机坏了。6.owe 熟义：欠， 欠债生义：（1）感恩；感激We owe our parents a lot.我们十分感激父母。I owe you for your help.我感谢你的帮助。（2）（常与to连用）归功于She owes her success to good luck.她把成功归功于幸运。The young writer owed his success to his teachers encouragement.年轻作家把自己的成功归于他老师的鼓励。四、常考词组1 obey the rules/ law 遵纪守法2 obje
6、ct to (doing) sth 反对sth3 raise/ make an objection to sth 反对sth4 achieve/ meet/ accomplish/ set an objective 实现目标/设定目标5 oblige sb to do 使sb不得不做sth feel obliged to do 感到应该做sth6 under observation 在观察下7 obstacle to sth sth的障碍8 obtain information 获得信息9 obvious reasons 明显的原因10 on.occasion 在的场合11 occupy sb
7、 with (doing) sth 使sb忙于做sth12 It occurs to sb to do/ that sb想起13 offer sb sth = offer sth to sb 提供sb sth offer to do 主动提出做sth14 in office 在当权15 more often than not 经常16 the Olympic Games 奥运会 the Olympics17 omit to do 省略做sth18 at once 立即，马上 once a month 一个月一次 once more/ once again 再次 once in a while
8、偶尔 once upon a time 从前 Once bitten, twice shy. 一朝被蛇咬，十年怕井绳。19 in the open air 在露天 be open/ opened to the public 向公众开放 be open to 对开放 an open mind 思想开放20 at the opening of 在sth开幕的时候21 operate a machine 操作机器 operate on sb 给sb做手术22 have/ undergo/ perform an operation 进行手术23 in sbs opinion 在sb看来 persona
9、l opinion 个人观点 have a high/ low/ good/ bad opinion of 对sth/sb评价高/低24 oppose sth 反对sth be opposed to sth 反对sth25 in order to do/ that 为的是 give/ issue an order 发布命令 follow/ obey orders 听从sb的命令 in order 井然有序 out of order 没有秩序 order sb to do 命令sb去做sth26 ordinary people/ life 普通人/生活27 any other student 其
10、他的任何一个学生 someothers 一些一些 other than 除了之外 the other day 过去的某一天 in other words 换句话说28 ought to do sth 应该做sth29 outdoor activities 户外运动30 over and over 一次又一次 over there 在那里31 overcome the difficulties 克服困难32 overlook the fact 忽视事实 overlook the ocean 俯瞰大海 overlook his faults 原谅他的错误33 owe sth to sb 把sth归
11、功于sb owing to 由于34 on ones own 独立 of ones own 属于sb自己的五、常见难词（大纲词汇+超纲词汇）Oceania n. 大洋洲oblige vt. 迫使；施恩惠于obedient adj. 服从的，顺从的，孝顺的obstacle n. 障碍，障碍物，妨害odd a. 奇数的；单只的oddity n. 古怪，怪异，怪人odour n. 气味，香气；味道 omit vt. 省略，省去；遗漏 opponent n. 对手，敌手；对抗者 oppress vt. 压迫，压制；压抑 option n. 选择，选择权 orchestra n. 管弦乐队 orderl
12、y a. 整洁的；有秩序的 organic a. 有机体的；器官的 oriental a. 东方的；东方国家的 ornament n. 装饰物；装饰 orphan n. 孤儿 ounce n. 盎司，英两 outline n. 轮廓；略图；大纲 outskirt n. 外边，郊区 overall n. 工装裤 a. 全面的，总体的overlook vt. 俯视，忽略，不理会 obscure adj. 暗的, 朦胧的, 模糊的 v. 使阴暗，隐藏，使含糊olive n. 橄榄，橄榄树outbreak n. 爆发overwhelming a. 压倒性的，令人不知所措的六、不规则动词变化occuroccurred occurred overcomeovercameovercome