大学英语四级单词大全
- organisation
- offense
- on a scale
- on
- on a diet
- obey
- on cue
- object
- on account of
- on and on
- on behalf of
- on condition that
- on board
- on business
- on demand
- on earth
- on end
- on file
- on duty
- on edge
- on fire
- on foot
- on line
- on loan
- objective
- obligation
- oblige
- observation
- observe
- observer
- on no account
- obstacle
- obtain
- obvious
- occasion
- occasional
- occupation
- occupy
- occur
- occurrence
- ocean
- of no account
- October
- odd
- of
- of a kind
- odds and ends
- of course
- of late
- of necessity
- of note
- of sorts
- off
- off balance
- off duty
- off the air
- off the hook
- off the record
- offence
- offer
- offensive
- offend
- office
- officer
- often
- official
- oil
- on the run
- okay
- old
- omit
- on the shelf
- on the side
- on the spot
- on the spur of the moment
- on the strength of
- on the table
- on the trot
- on the whole
- on thin ice
- on time
- on top
- on top of
- once
- once and for all
- once more
- once in a while
- once upon a time
- on order
- on paper
- on purpose
- on record
- on sale
- on the contrary
- one after another
- on occasion
- on schedule
- on the quiet
- on that score
- on the grounds of
- on the alert
- on the air
- on the button
- on the go
- on the average
- on the house
- on the horizon
- on the hour
- on the increase
- on the road to
- on the move
- on the job
- one by one
- on the one hand
- on the other hand
- on the point of
- on the part of
- one another
- one way or another
- oneself
- onion
- only
- opening
- one day
- orchestra
- order
- onto
- open
- orderly
- only too
- ordinary
- open up
- opera
- operate
- ore
- organic
- organ
- organism
- organise
- organization
- origin
- other than
- original
- other
- otherwise
- out of character
- ought to
- ounce
- our
- ourselves
- out
- ours
- out of
- out of action
- out of breath
- out of date
- out of doors
- out of hand
- out of control
- out of joint
- out of line
- out of luck
- out of order
- out of place
- out of pocket
- out of practice
- out of print
- operation
- operational
- operator
- opinion
- opportunity
- oppose
- opposite
- opponent
- optimistic
- option
- optional
- or
- outcome
- or so
- or else
- outset
- or something
- oral
- orbit
- orange
- out of work
- outdoor
- outlet
- outer
- outline
- outlook
- output
- outside
- over
- outstanding
- outward
- oval
- oven
- over and above
- over and over again
- over the hill
- overnight
- overseas
- overcoat
- overhead
- overcome
- overall
- overlook
- overtake
- oxygen
- owe
- owing
- owing to
- own
- own up
- owner
- ox
- out of season
- out of sorts
- out of step
- out of stock
- out of the blue
- out of the ordinary
- out of sight
- out of tune with
- out of the way
- out of touch with
- out of use
- out of the question