参考答案：D

解析：句子结构。根据原文“He decided that he had no choice but to reconcile himself to being a petty clerk for the rest of his life．”，译文为：他决定了他没有其他选择，只有让自己屈服，在他的余生只做一名小小的职员。本句关键是理解句子结构have no choice but…，意思是：没有别的选择只有……，所以应选d。