Question

一道英语题，要详解。

Shortly after the accident,two ___policemen were sent to the spot to keep order.
A.score of B.scores of C.dozens of D.dozen of
答案是A。希望区别一下A和C以及score和dozen的用法
侧重点是SCORE 和DOZEN

Answer 1

一、dozen表示“ 打，十二个”的意思，而score表示“二十”的意思。

二、两词与数词，a,many,several连用修饰名词复数时，都要用单数，其后的介词of有无均可。但是，习惯上score多与of连用，而dozen很少与of连用，如：two score(of)workers,three score and ten people,several dozen children,many dozen books。

三、两词与of连用（of不省略）时，可用于人称代词宾格（us,you,them）或指示代词（these,those）修饰的名词前，表示所属关系。如：a dozen of these/those pelple,two dozen of them/us,a score of these/those workers.

四、 两词的复数形式与of连用时，表示不确切的数量，意为“许多……，大量的……”。如：dozens of people,dozens of times,scores of people.而some dozen people是“一打左右的人”（大约十二人）与some dozen of people同义。（some）dozen of people是“若干打的人”（几十个人，许多人）。

五、除了上述用法之外，还要注意下列习惯用语：（pack）in dozens〔成打（包装）〕，（sell）by the dozen[论打（出售）],in scores(成批的)

练习：1. The woman wanted to buy three____eggs,but there were only two___eggs left inthe shop.
A.scores of;dozens of B.scores;dozens C.score of; dozen of D.score of;dozen

2.The goods are packed in____and shipped in____all over the world.
A.dozens;scores B.scores;dozens C.dozens;score D.score;dozen

3.The teacher wanted to buy two___books,but the salesgirl only sold him___these books.
A.scores of;dozens of B.scores;dozen of C.score of;dozen of D.score of;dozen

答案：1、D 2、A 3、C

参考资料： http://hi.baidu.com/qunzhi0510/blog/item/313e792b7e549e305343c1e5.html

Answer 2

the police警察局, 警务人员(总称)=(=policemen)警察

police,policeman,officer,constable这四个词都表示“警察”。

police是集体名词，总是单数形式，但应当用复数形式的谓语

As usual, the police will have a difficult time.
警察的日子照例不会好过的。

policeman(policemen 复数)指一名警察，可以是交通警察，也可以是侦探警察或公安警察
The workmen told him to do as he pleased and the policeman telephoneed for help.
工人对那个警察说随他的便，于是那个警察就打电话求助了。

在英国英语中常以policeofficer出现，含义等于policeman. 现代英语中常用officer用来直接称呼policeman。然而在过去英国没有policeman 一词之前officer 一直用来表示与治安有关的任何官员
Harry:I'm afraid I didn't, officer.
哈利：恐怕是我没有看到，警官。

而Policemen是policeman的复数形式

但是，没有policemans这种写法！