【题目】Not having worked out the program, ________ leave the office.
A.so he was forbidden to
B.and he didn;t want to
C.his little son couldn;t make him
D.he couldn't free himself to

【答案】D
【解析】这题考查句子结构分析，Not having worked out the program,是现在分词做状语，后面只能是主句，排除AB，又因为Not having worked out the program,的逻辑主语是he，所以选D。