-How long ______ each other before they ______ married?
--For about a year.
A．have they known; getB．have they known; were going to get
C．do they know; are going to getD．had they known; got
D
談?wù)摰氖沁^去的事情，從句用一般過去時，主句動作發(fā)生在從句動作之前，用過去完成時。
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