The young man of working for others is determined to start his own firm.A. being tiredB

问题补充：

The young man, of working for others, is determined to start his own firm.

A. being tired

B. having tired

C. to be tired

D. tired

答案：

A. being tired

B. having tired

C. to be tired

(答案→)D. tired

解析：考查非谓语动词。句意：这个年轻人，厌烦了为别人打工，决定开办自己的公司。过去分词表示被动的动作，和句子主语是被动关系。故选D。