高等继续教育 / 大学英语语法
正确率：100%
题型描述: 单选题
“How long ＿＿＿＿＿ each other before they ＿＿＿＿ married?” “For about a year.”
A.had they known ; got
B.did they know ; were going to get
C.do they know ; are going to get
D.have they known ; get
“How long ＿＿＿＿＿ each other before they ＿＿＿＿ married?” “For about a year.”
A.had they known ; got
B.did they know ; were going to get
C.do they know ; are going to get
D.have they known ; get
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