成人英语雅思单词大全
- onset
- oust
- oblique
- oblong
- obscene
- ongoing
- oscillate
- ostensible
- outright
- oversee
- overture
- obligatory
- obnoxious
- observance
- Odyssey
- onlooker
- orientate
- outcast
- outcry
- outdo
- ovation
- oar
- oasis
- oath
- obedient
- object
- objection
- objective
- obligation
- oblivious
- oblige
- obliging
- obscure
- observatory
- observe
- obsession
- obsolete
- obsess
- obstinate
- obstruct
- obvious
- occasion
- occupy
- occur
- occurrence
- odd
- odds
- odds and ends
- odour
- on account to
- offer
- offence
- offend
- offset
- off-hand
- offshore
- offspring
- omen
- ominous
- omit
- on and off
- on and on
- on behalf of
- on board
- on condition that
- on end
- on good terms with sb.
- on edge
- on hand
- on the air
- on no account
- on time
- once
- once in a while
- once more
- oncoming
- one
- one another
- opaque
- opening
- opinion
- opponent
- opportunity
- oppose
- opposite
- opt
- optical
- optimism
- optimum
- option
- optional
- orbit
- orchard
- orchestra
- ordeal
- orderly
- ore
- organ
- organism
- oriental
- orientate oneself
- origin
- original
- originate
- ornament
- orthodox
- out of line with
- ostentation
- out of stock
- outbreak
- outcome
- outdated
- outfit
- outline
- outlaw
- outlet
- outlying
- output
- outrageous
- outset
- outskirts
- outspoken
- outstrip
- outweigh
- oval
- overflow
- overlap
- overall
- overhaul
- overhear
- overdue
- overlook
- override
- overt
- overrun
- overthrow
- overwhelm
- overwrought
- overtake
- owe
- oxide
- ownership