—Do John and Betty have a child？ —Yes. They for twenty years.A. marriedB. have marriedC.

问题补充：

—Do John and Betty have a child？

—Yes. They for twenty years.

A. married

B. have married

C. have got married

D. have been married

答案：

A. married

B. have married

C. have got married

(答案→)D. have been married

解析：若问某人是否结婚，而不涉及结婚的对象，可用be / get married的形式，相当于系表结构；be married 强调已经结了婚的关系，get married强调结婚这个动作。根据句意选D符合题意。