问题补充：
Mary said they with each other for six years before they got married.
A. has fallen in love
B. had fallen in love
C. had been in love
D. has been in love
答案：
A. has fallen in love
B. had fallen in love
(答案→)C. had been in love
D. has been in love
解析：句意：Mary说他们结婚之前彼此相爱了6年。根据句子可知，相爱被got married早，故用过去完成时，fall in love是动词短语表动作，不能持续。Be in love表状态，故用had been in love。选C。
