单选题 Had they had enough cash on hand, they would buy this fancy furniture.
A. Had
B. on
C. would buy
D. furniture

【正确答案】 C
【答案解析】改为would have bought。这是虚拟语气中的用法,表示对过去情况的假设,用法是:If…had…/Had…,…would haVe done。