His parents for over 40 years and they love each other very much.A. have been marriedB. ha

问题补充：

His parents for over 40 years and they love each other very much.

A. have been married

B. have married

C. will marry

D. married

答案：

(答案→)A. have been married

B. have married

C. will marry

D. married

解析：句意：他的父母结婚有四十年了。他们彼此非常相爱。现在完成时表示过去已经开始，持续到现在的动作或状态往往和表示一段时间的状语连用。for+一段时间，since+一段时间点或过去时态的句子。故选A。