【题目】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
在线课程【答案】C
【解析】
试题分析：if not tired from work是if I'm not tired from work的省略形式。在条件、时间等状语从句中，如果从句的主语与主句的主语相同且含有系动词be，可把从句中的主语和系动词be省略。故选C。