80,on the dot =准时,正点
-Did you and a man Amanda really meet exactly five minutes to two in front of the theater?
Yes, we were both there on the dot
81,on earth =究竟,到底
-How on earth can you believe that?
82,on end = 连续,没完没了的
-Did Linda ever finish that introductory chapter?
I am not sure; she spent hours on end rewriting it
83,on one's own =独立的,凭自己的力量
-She learned to use the computer on her own
84,on sale =减价
-Did you buy any of the sweaters that were on sale?
Buy any, I got five of them, there were such a good bargain
85,on campus =在校内
-Michel is the most talented actor on campus
Isn’t he though?
86,on the side =兼职,副业
-He has a job on the side preparing a libratory every day for the next experiments
87,once and for all =最后一次,干脆
-I am going to tell that neighbor of mine to turn down that music once and for all
I see why you are angry, but I've always found that the polite route is the most effective
88,out of =缺乏,没有
-I'd like to buy a copy of professor Franklin's book on shelves shells(贝壳)
I am very sorry, that you’ve been out of print for some time now
-The bookstore is out of textbooks for France 102
-How can we be out of salt, I bought them only last week
-The bookstore is out of lined notebook paper 划线的笔记本
89,out of business =停止,停产
-The supermarket down the street is selling everything half price because they are going
Out of business
Sounds like an idea time to stock up on coffee
90,out of earshot = 不在听力所及范围
-Hey, Joe, Joe, save your breath
He’s out of earshot
91,out of it =神情恍惚,心不在焉
-Peter's really out of it these days
Yeah I know, ever since he met Anne, he’s been in another world
92,out of one's mind =神经失常
-Gerry says he's planning to take an extra course this term
He’s got to be out of his mind
重点阅读：
新东方托福：
新东方托福培训视频：
托福辅导：
