托福听力突破破解(含序列号及习语)三十

　　1on loan

　　2on one's own

　　3on one's way to

　　4on purpose

　　5on sale

　　6on short notice

　　7on the dot

　　8on the right track

　　9on the side

　　10on the tip of one's tongue

　　1on the whole

　　2on time

　　3on top of

　　4once and for all

　　5once every other…

　　6once in a while

　　7once more

　　8one day is as good as the next

　　9one in a million

　　10one step at a time

　　1open a savings account

　　2or so

　　3or something

　　4oral presentation

　　5order sth. From a catalog

　　6order through mail

　　7organic chemistry

　　8other than

　　9out of bounds

　　10out of breath