31. —How long each other before they married?
—For about a year.
A. have they known, get
B. did they know, were going to get
C. do they know, are going to get
D. had they known, got
网友回答
A. have they known, get
B. did they know, were going to get
C. do they know, are going to get
(答案→)D. had they known, got
解析：可联系答.案.网客服索取。