in prison for ten years no one recognized him.A. The man’s having putB. The man being p

问题补充：

in prison for ten years, no one recognized him.

A. The man’s having put

B. The man being put

C. The man having been

D. Having been

答案：

A. The man’s having put

B. The man being put

(答案→)C. The man having been

D. Having been

解析：独立主个结构做原因状语。