问题补充：
It is a long time since I last saw you . This sentence means
A. I had seen you for a long time
B. I have seen you for a long time
C. I haven’t seen you for a long time
D. I saw you again before long
答案：
A. I had seen you for a long time
B. I have seen you for a long time
(答案→)C. I haven’t seen you for a long time
D. I saw you again before long
解析：可联系答.案.网客服索取。
