He will e to understand your efforts sooner or later. It’s just a of time.
A. criterion
B. patent
C. variety
D. matter
网友回答
A. criterion
B. patent
C. variety
D. matter
解析：考查名词：A.criterion标准B. patent专利C. variety各种各样D. matter事情，问题。句意：迟早他会理解你的努力的，这只是时间问题。选D。