There are more than three students in our school. Look students are having a gathering o

问题补充：

There are more than three students in our school. Look, students are having a gathering on the square.

A. thousands of; hundreds of

B. thousand; hundreds of

C. thousand of; hundreds of

D. thousand of; hundred of

答案：

A. thousands of; hundreds of

(答案→)B. thousand; hundreds of

C. thousand of; hundreds of

D. thousand of; hundred of

解析：当thousand之前有具体数字时，用单数；hundred 前面没有数字，用复数。