He has been doing the job for many years but has never felt it though his workmates thi

问题补充：

He has been doing the job for many years, but has never felt it, though his workmates think it is a one．

A. tired of; tired

B. tired of; tiring

C. tiring of; tired

D. tiring of; tiring

答案：

A. tired of; tired

(答案→)B. tired of; tiring

C. tiring of; tired

D. tiring of; tiring

解析：考查形容词用法。Be tired of 对…厌倦；tired感到厌倦的；tiring令人厌倦的；句意：他多年以来一直在做这份工作，但是他从来没有对它感到厌倦。尽管他的同事们认为这是一份令人厌倦的工作。