John’s ability to learn from observations and experience greatly to his success in public

网友回答

A. owed
B. attached
C. related
(答案→)D. contributed
解析：考查动词短语的意义。owe to“归功于”； attach to “附属于”； relate to “涉及，有关”； contribute to “有助于”句意：约翰的这种通过观察和经验学习的能力大大促进了他的在社会生活上的成功。