大学英语四级单词大全
- over and over
- out of practice
- out of touch
- out of the question
- out of sight
- out of place
- out of breath
- out of order
- once in a while
- out of doors
- out of date
- out of control
- once for all
- once again
- on time
- on the whole
- on the spot
- on the road
- on the point of
- on the other hand
- on the ground of
- on the contrary
- on second thoughts
- on schedule
- on sale
- on purpose
- on occasion
- on hand
- on foot
- on fire
- on guard
- on earth
- on duty
- on condition that
- on one hand
- on business
- on board
- on behalf of
- on account of
- on a small scale
- on average
- on a large scale
- off and on
- optimistic
- on the basis of
- on the whole
- once in a while
- on purpose
- on duty
- off duty
- on the contrary
- on the spot
- on business
- own
- oversea
- over
- outside
- out
- ourselves
- ours
- our
- on condition that
- out of
- other
- origin
- of itself
- on the ground of
- orange
- only
- open
- onion
- once
- on
- omit
- old
- often
- oil
- on board
- official
- office
- offend
- of
- odd
- October
- ocean
- occur
- occupy
- one after another
- occasion
- or so
- observe
- oblige
- object
- once
- omit
- old
- oil
- on
- ox
- owner
- own
- owl
- owing
- owe
- overwhelm
- overvalued
- overthrow
- overtake
- overproduction
- overpass
- overlook
- overlap
- overhear
- overflow
- overdraw
- overcome
- overcoat
- over
- oven
- outward(s)
- outstanding
- outside
- output
- out-of-stock
- outlook
- outline
- outlet
- outing
- outer
- outdoor
- outcome
- out
- ourselves
- ours
- our
- ounce
- ought
- otherwise
- other
- orthodox
- ornament
- original
- origin
- orient
- organization
- organize
- organ
- ordinary
- orderly
- order