Uncle John is getting old and he has trouble what others say to him. A. hearing B. hear C

问题补充：

Uncle John is getting old and he has trouble what others say to him.

A. hearing B. hear C. to hear

答案：

解析：考察固定句式。句意：约翰叔叔变老了，听见别人对他说什么有困难。Have trouble doing sth做某事有困难，故选SA。