－students are there in your class? －There are 56.A. How manyB. WhoC. WhatD. When

问题补充：

－students are there in your class?

－There are 56.

A. How many

B. Who

C. What

D. When

答案：

(答案→)A. How many

B. Who

C. What

D. When

解析：How many多少个；Who谁；What什么；When什么时候；根据下文答语，有56个。可知上文提问数量，故选A。