Nearly all the people believe confidence is the key to success.A. interviewingB. having in

问题补充：

Nearly all the people believe confidence is the key to success.

A. interviewing

B. having interviewed

C. to interview

D. interviewed

答案：

A. interviewing

B. having interviewed

C. to interview

(答案→)D. interviewed

解析：考查非谓语动词用法。People与interview构成被动关系，所以使用过去分词的形式表示被动关系。句意：几乎被采访的所有人都认为信心是成功的关键。