I＿＿＿＿＿＿＿＿you a beautiful present for your birthday,but I was short of money at that time.
A. would buy
B. had bought
C. would like to have bought
D. must have bought
网友回答
A. would buy
B. had bought
(答案→)C. would like to have bought
D. must have bought
解析：从 but 引导的分句可看出,前一分句是与过去事实相反的假设。