The text is too difficult. The explanation of our teacher will help make it easy .A. to u

问题补充：

The text is too difficult. The explanation of our teacher will help make it easy .

A. to understand

B. to be understood

C. understood

D. understanding

答案：

(答案→)A. to understand

B. to be understood

C. understood

D. understanding

解析：A考查非谓语动词。句意：这篇文章太难了，我们老师的解释会使它易于理解。此处用不定式的主动形式表示被动含义。此种用法常用于“be＋性质形容词＋不定式”结构中，此类形容词有easy，hard，interesting等。