—Look! She is running so fast!—Hard to her legs were once broken.A. realizeB. knowC. find

问题补充：

—Look! She is running so fast!

—Hard to her legs were once broken.

A. realize

B. know

C. find

D. imagine

答案：

A. realize

B. know

C. find

(答案→)D. imagine

解析：根据上下文的内容可知答案为D，表示设想的意思。故选D