Every evening after dinner，if not from work，I will spend some time walking my dog.
A. being tired
B. tiring
C. tired
D. to be tired
网友回答
A. being tired
B. tiring
(答案→)C. tired
D. to be tired
解析：省略句式。在if引导的条件状语从句中，从句中还原应为if I am not tired from work，根据省略的原则，所以选C。