问题补充：
---Excuse me, when you the girl over there?
---Last year in Beijing. And I her for about one year.
A. have known; have known
B. did know; knew
C. did know; have known
D. have known; knew
答案：
A. have known; have known
B. did know; knew
(答案→)C. did know; have known
D. have known; knew
解析：根据答语内容的回答Last year in Beijing，可知第一空问句应该用一般过去时，而第二空根据时间状语for about one year，可知答案为C
