题目：—How long each other before they ？ —For about four years。
2020-02-27
A.Have they known; married B.did they know;were married
C.do they know;are going to get married D.had they know;got married
正确答案：D
试题解析：
A.Have they known; married B.did they know;were married
C.do they know;are going to get married D.had they know;got married
正确答案：D
试题解析：
