2017年学生必背高考英语3500词
现在英语复习已经进入了最后的攻坚阶段。这一阶段主要是做大量的综合题，在做题的过程中，还是要加强对单词的记忆与复习。总之，不到高考结束那一刻，就不能放松对词汇的记忆与检查。下面是小编整理的高考英语3500词以O开头的部分，希望能帮到大家!
高考英语3500词【O】
1. object n. 物品，宾语 v. 不同意 everyday objects 日常物品
her object in life=aim 目标 object to n./doing… 反对;不同意
Many local people objected to building the new airport. objective adj. 客观的
2. ◎ observe v.观察，监视，观测
observe sb do sth观察某人做某事; observe sb doing sth 观察某人在做某事
与…无关 很容易
observe sth done 观察某事被做 observed Christmas Day/one’s birthday 庆祝…
observe the law 遵守…
3. ●obtain vt/vi 获得;得到;存在 1).obtain advice/information/permission
2).These customs no longer obtain.
4. ◎ occupy v.居住;占有，占用(时，空);占领
The house is occupied. …有人住 The bathroom is occupied. …有人用
The dinner occupied 2 hours. Many anxieties occupied his mind.
忙于某事
5. ●occur vi (occurred, occurred) - happen发生
1).When exactly did the accident occur?
2). Sth occurred to/hit/struck sb. 出现在头脑中，被想到 The idea occurred to him in a dream.
3).It occurred to me that I had left my keys in the room. It didn’t occur to her to ask for help.
6. offer n./v. 主动提议 He offered 5000 dollars for the car. 出价
offer sb. sth./sth. to sb. 主动给 offer to do… 提出做
supply sb. with sth./supply sth. to sb. provide sb. with sth./provide sth. for sb.
Thanks for your kind offer of help.
7. office n. 办公室，办公楼 officer n. 警官，军官
office building/block 办公大楼 hold office 占据要职
in office/out of office 任职/离职 开始执政
8. official adj. 官方的，正式的 n. 高级官员
the official language 官方语言 an official affair 公务
9. once adv. 一次 conj. 一旦 all at once=suddenly 突然 at once 立即，同时
(just) for once/just this once 仅此一次
Once bitten, twice shy. 一朝被蛇咬，十年怕井绳。 once more=once again 再一次
once upon a time 从前，很久以前 (every) once in a while 偶尔，间或
10. one one by one 逐个的 one after another 一个接一个 one another 相互
11. oneself of oneself 自动地 for oneself 亲自 (all) by oneself 独自
talk to oneself=think aloud 自言自语 enjoy oneself 玩得开心
I am not myself today. 身体不舒服 Help yourself to some fish. 随便吃
12. only adv./adj 仅仅 I am an only child. 独生子
not only … but (also) … only to do… (意想不到的)结果...