There are of nurses in our school but only of them are boys.Ahundreds three hundred.B.

问题补充：

There are of nurses in our school but only of them are boys.

Ahundreds, three hundred.

B. hundred, three hundreds

Chundreds, three hundreds.

D. hundred, three hundred

答案：

(答案→)A. hundreds, three hundred.

B. hundred, three hundreds

C. hundreds, three hundreds.

D. hundred, three hundred

解析：hundreds of 为固定词组搭配，three hundred of the +n或名词复数形式选A