7.-----How long _ each other before they married

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7.-----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
D,为什么不是A?

本句译为：他们结婚前他们已经认识多久了.
下面我们来看分析.
整个句子的动作应发生在过去.因此before后的从句应用过去时.排除ABC.
P.S.这个句子有两个动作,一个是认识,一个是结婚.认识是在结婚的前面,因此认识是过去的过去,要用过去完成时,也应选D.

7.-----How long ___ each other before they __ married ---how long ___ each other before they ___ married How long ____each other before they _____ married known,how long,have they,each other How long should a couple know each other before they get mar they can communicate with each other ___ than before(enable) How long have they ___?A.been married B.got married 翻译下面的句子：They had not known each other long before they got m 1.they __(hug) each other for the success after a long perio They don't ___ ___ each other. How long have you known each other? they live ___(close) to each other.