be of…结构小结用法复习知识点精析精练
1)be of + 表示年龄（age）、大小（size）、颜色（color）、重量（weight）、高度（height）、价格（price）、意见（opinion）、形状（shape）、种类（kind）和方法（way）等名词，说明主语的特征，of表示“具有”之意，有时可省去。例如：
They are both of middle height.他俩都是中等个儿。
When I was of your age, I was a teacher.当我是你这个年龄时，我当老师了。
These flowers are of different colors.这些花朵颜色不同。
Tom is of a different way of thinking.汤姆的思维方式与别人不同。
注意：此结构中，如果of后面的名词前有不定冠词a/an，则a/an=the same.例如：
The two boys are of an/the same age.这两个男孩同龄。
These bottles are of a/the same size.这些瓶子大小一样。
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2)be of + 物质名词，表示主语是由某材料制成或某成分构成，相当于be made of, be built of或be made up of等。例如：
The necklace is(made)of glass.这项链是玻璃制的。
The bridge is (built)of stone.这桥是由石头构筑的。
Our class is (made up)of over 50 students. 我班有50多个学生。

3)be of + 抽象名词（如value, importance,use, help等），of表示“具有、具备”等意思，of不能省，这一结构相当于be+该抽象名词相应的形容词。例如：
They are of great help/ very helpful to learners of English.他们对英语学习者来说是很有帮助的。
In fact, sports and games can be of great value/very valuable.事实上体育运动是很有价值的。
The book is of no use/useless to us.这书对我们无用。
It is of great importance/very important to study English.学习英语很重要。
因此，根据上述(1),(2)点可以看出，课文句中第一个be of 结构表示“具有”，第二个be of(承前省去be)表示“由……制成的”。全句汉语意思为：“硬币的大小、重量、形状可能各不相同，并由不同的金属制成。”

1.___ has a good education can apply for the job.   
A. Who B. Whoever C. Anyone D. Whoever
2.___ is hard is to do good all one's life and never do anything bad.   
A. He B. It C. That D. What
3.___ worries me is___ we're going to pay for all this.   
A. It; that B. That; how C. What; how D. As; that
4.___ is said that paper was invented in China.   
A. As B. Which C. It D. That
5. Many people thought little of me, but I did what___.
A. I thought I was right B. I thought it was right   C. I thought was right D. I was thought righty
6. The manager has decided to put___ he think is energetic, clever, and has good sense of duty in the position of the leadership of the company. 
A. those who B. anyone C. whomever D. whoever
7. Scientists believe native Americans arrived by crossing the land bridge that connected Siberia and___ more tan 10,000 years ago.
A. this is Alaska B. Alaska is now Alaska C. is now Alaska D. what is now Alaska
8. Please tell me___ you would like to have your coffee--- black or white    
A. what B. where C. which D. how
9. My mother asked___ with me.
A. what was the wrong B. what the matter was  C. what matter was D. what was the matter
10. Some of the scientists held the point___ the book said was right.
A. what what B. what what C. that that D. that what
答案：
1-5 BDCCC 6-10 DDDDD

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