There are three students on the playground.A. hundredB. hundreds ofC. hundred ofD. hundre

问题补充：

There are three students on the playground.

A. hundred

B. hundreds of

C. hundred of

D. hundreds

答案：

(答案→)A. hundred

B. hundreds of

C. hundred of

D. hundreds

解析：句意：在操场上有三百名学生。hundred前有数词时，它用单数，后不用介词of；当hundred前没有数词时，后可用介词of；hundred用复数形式。故选A。