Question

--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

Answer 1

答案：D
解析：

两个人“相识”的动作应发生在“结婚”之前，又因出现了before故知第一个空用过去完成时。