改错题 73.I would buy her a good present for her birthday, but I was short of money at that time.
【正确答案】 C
【答案解析】这句话的意思是:我本想给她买一件好的生日礼物,但那时我缺钱。从but引导的分句可以看出,前一分句是与过去事实相反的假设。与过去事实相反的虚拟语气中,其主句的结构为should/could/might/would+have done,因此选C。