高中英语词汇

obey object observe obtain obvious occupation occur Oceania October of off offence offer office officer official offshore often oh oil oilfield OK old omelette on on purpose once one oneself onion only onto open opener opening opera operate operation operator opinion opinion oppose opposite optimistic optional or oral orange orbit order ordinary organ organise organiser organization organize origin other otherwise Ottawa ouch ought our ours ourselves out out of work outcome outdoors outdoors outer outgoing outing outline outline output outside outspoken outstanding outward oval over overcoat Overcoat overcome overlook overweight owe own owner ownership ox oxygen