There are over books of all kinds in the library.A. nine hundred ofB. nine hundredsC. nin

问题补充：

There are over books of all kinds in the library.

A. nine hundred of

B. nine hundreds

C. nine hundred

D. hundred of

答案：

A. nine hundred of

B. nine hundreds

(答案→)C. nine hundred

D. hundred of

解析：hundred是一个确数，表示一百，此时后面不加s，hundreds of是一个概数，表示“数以百计”。当hundred 与of连用时，它后边的名词和它本身都用复数。hundreds能用在介词短语中表概数。