The English in this story has been simplified to make it easier .A. to be understood B. un

问题补充：

The English in this story has been simplified to make it easier .

A. to be understood

B. understood

C. understanding

D. to understand

答案：

A. to be understood

B. understood

C. understanding

(答案→)D. to understand

解析：句意：在这个故事中英语被简化了为了使它更容易理解，题中的结构make it easier to understand, it做形式宾语，真正的宾语为不定式to understand，所以选D。