1. The US government is based on the principle of check and balance.(x)
The US government is based on the principle of checks and balances.(√)
checks and balances是指行政、立法和司法机关的互相制衡，用复数形式。
2. The importance of a balance diet cannot be overemphasized.(x)
The importance of a balanced diet cannot be overemphasized. (√)
balanced是形容词，常用来修饰名词，如:a balanced budget即指“平衡的预算”。
3. The ban is likely to be cancelled at the end of the year. (x)
The ban is likely to be lifted at the end of the year. (√)
impose / lift a ban (on sth)是(针对某件事情)“颁布懈除禁令”的固定说法。
4. The company has declared bankrupt. (x)
The company has declared bankruptcy.(√)
bankrupt通常作形容词，如:go bankrupt就是“破产”的意思。bankrupt作名词时，意为“破产人士”，是可数名词，如:As a bankrupt, I am unable to pay the debts.(沦为破产人士，我无力偿债。)“宣告破产”须用名词形式 bankruptcy 来作 declare的宾语。
5. My son was admitted to a bar at the age of 22. (x)
My son was admitted to the bar at the age of 22. (√)
be admitted to a bar可以解释为“获准进入一家酒吧”。the bar是指“律师业”，所以be admitted to the bar=become a lawyer，即“成为律师”之意。
6. He is so drunk that he can bare stand. (x)
He is so drunk that he can barely stand. (√)
bare是形容词。意为“光秃秃的”或“没有遮蔽的”，如:The baseball landed on his bare head.(那颗棒球掉落在他光秃秃的头上。)barely=hardly=scarcely, 意为“几乎不”，是副词，因此能够修饰动词。
7. John made a fortune and married a beautiful woman in a bargain.(x)
John made a fortune and married a beautiful woman in the bargain. (√)
in / into the bargain=in addition，表“除此之外”的意思。另外，bargain也表“廉价品”，如:Many bargain hunters went to the computer fair.(许多寻找便宜货的人去逛计算机展了。)
8. Our subsidiary comrany is based on Malaysia.(x)
Our subsidiary company is based in Malaysia. (√)
be based on是“根据……”或“以……为基础”的意思，如The movie is based on a best-seller.(这部电影是根据一本畅销书改编的。) be based in + 地方，是“设立于某地”的意思。
9. Irene is learning the basic of computer programming. (x)
Irene is teaming the basics of computer programming.(√)
basic是形容词，意为“基本的”，不能充当名词使用。the basics(恒用复数)才是名词的正确用法。所以the basics of sth=the basic knowledge / fact of sth.
10. They are all employed on a full-time base.(x)
They are all employed on a full-time basis. (√)
base作名词时，专指具体(可见)的基础，像摆放东西的“底座”或“军事基地”，如:The statue is placed on a solid base.(这尊雕像被安放在一个稳固的底座上。) basis专指抽象的基础，如:on a daily/weekly/monthly / part-time basis是指“按天周/月计算”或“以兼职的方式”。