______ enough time and money, the researchers would have been able to discover more in this field.[1998]
【正确答案】 C
【答案解析】解析:根据句子结构可知,逗号前面的部分作状语,而give与逻辑主语之间是动宾关系,因此用过去分词given。故正确答案为选项C。