Every evening after dinner ,if not [ ] from work ,I will spend some time walking my dog.【说原因】

题目

Every evening after dinner ,if not [ ] from work ,I will spend some time walking my dog.【说原因】
A,being tired B,tiring C,tired D,to be tired

答案

答：选C
解析：考查非谓语动词.根据固定搭配：sb.be tired from“某人因……累了”,当从句的主语和主句的主语一致时,可将主语和部分系动词、助动词等省略,只剩下主要动词,故选C.本句是“连词＋过去分词”构成的省略.