问题补充：
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. be couldn’t free himself to
答案：
A. so he was forbidden to
B. and he didn’t want to
C. his little son couldn’t make him
(答案→)D. be couldn’t free himself to
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。
