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第八部　第九课 --- 请重复跟读，直到可以於声音档的留空之间唸完整句為止；熟练之后您必将可以 "脱口而出" 地说出标準的美式英语

on time
It's ten o'clock now. We'll be on time, won't we?
You must make it to the appointment on time.
once and for all
The president decided to end the misunderstandings once and for all.
once in a while
Once in a while, Dirk would invite his friends to go fishing together.
The air conditioner would break down once in a while, especially if we don't turn it on often enough.
out of date
You've got a lot of food that is out of date in your refrigerator.
The numbers on the chart are out of date; your point is invalid.