i have to speak to my grandpa loudly because there's something wrong with his -----

问题描述:

i have to speak to my grandpa loudly because there's something wrong with his -----
A.ears
B.hearing
该选哪一个?理由?

B.hearing n.有“ 听力,听觉 ”的意思
因为这里的问题出在听力 而不是只是耳朵有问题
要用西方人的思维.