—Why did you buy so many flowers?
--Because today is a special day. My parents for twenty years .
A. married
B. got married
C. have been married
D. have married
网友回答
A. married
B. got married
(答案→)C. have been married
D. have married
解析：此题考查延续性动词和非延续性动词之间的区别。Got married， married，have married是非延续性动词，不能跟段时间状语连连用。