the words the daughter understood what her mother was trying to tell her.A. To be heard　B

问题补充：

the words，the daughter understood what her mother was trying to tell her.

A. To be heard

B. To hear

C. Heard

D. Hearing

答案：

A. To be heard

B. To hear

C. Heard

(答案→)D. Hearing

解析：句意：听了这些话，女儿明白了母亲想要告诉她什么。分析句子结构可知，逗号前面的部分为伴随状语，不是表目的，故排除A、B两项；hear和逻辑主语the daughter之间是主谓关系，故应用v.­ing形式，故选D项。