I have a difficult time k___ what you were doing when I called you.空里面填什么,为什么这么填.
问题描述：
I have a difficult time k___ what you were doing when I called you.空里面填什么,为什么这么填.
答
knowing
have a difficult time doinghave a difficult time doing汉语意思是什么？做……有困难那这一整句话应该怎么翻译？我打你电话时很难弄清楚你到底在做什么