現在英語複習已經進入了最後的攻堅階段。這一階段主要是做大量的綜合題，在做題的過程中，還是要加強對單詞的記憶與複習。總之，不到大學聯考結束那一刻，就不能放鬆對詞彙的記憶與檢查。下面是小編整理的大學聯考英語3500詞以O開頭的部分，希望能幫到大家!
1. object n. 物品，賓語 v. 不同意 everyday objects 日常物品
her object in life=aim 目標 object to n./doing… 反對;不同意
Many local people objected to building the new airport. objective adj. 客觀的
2. ◎ observe v.觀察，監視，觀測
observe sb do sth觀察某人做某事; observe sb doing sth 觀察某人在做某事
與…無關 很容易
observe sth done 觀察某事被做 observed Christmas Day/one’s birthday 慶祝…
observe the law 遵守…
3. ●obtain vt/vi 獲得;得到;存在 1)in advice/information/permission
2)e customs no longer obtain.
4. ◎ occupy v.居住;佔有，佔用(時，空);佔領
The house is occupied. …有人住 The bathroom is occupied. …有人用
The dinner occupied 2 hours. Many anxieties occupied his mind.
忙於某事
5. ●occur vi (occurred, occurred) - happen發生
1) exactly did the accident occur?
2). Sth occurred to/hit/struck sb. 出現在頭腦中，被想到 The idea occurred to him in a dream.
3) 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. 主動提議 He offered 5000 dollars for the car. 出價
offer sb. sth./sth. to sb. 主動給 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. 辦公室，辦公樓 officer n. 警官，軍官
office building/block 辦公大樓 hold office 佔據要職
in office/out of office 任職/離職 開始執政
8. official adj. 官方的，正式的 n. 高階官員
the official language 官方語言 an official affair 公務
9. once adv. 一次 conj. 一旦 all at once=suddenly 突然 at once 立即，同時
(just) for once/just this once 僅此一次
Once bitten, twice shy. 一朝被蛇咬，十年怕井繩。 once more=once again 再一次
once upon a time 從前，很久以前 (every) once in a while 偶爾，間或
10. one one by one 逐個的 one after another 一個接一個 one another 相互
11. oneself of oneself 自動地 for oneself 親自 (all) by oneself 獨自
talk to oneself=think aloud 自言自語 enjoy oneself 玩得開心
I am not myself today. 身體不舒服 Help yourself to some fish. 隨便吃
12. only adv./adj 僅僅 I am an only child. 獨生子
not only … but (also) … only to do… (意想不到的)結果...
