The findings of the research, on a lot of experiments, are convincing.
A. to base
B. based
C. is based
D. basing
网友回答
A. to base
(答案→)B. based
C. is based
D. basing
解析： 考查过去分词作定语，短语：be based on 以什么为基础，based on做定语在这里相当于which are based on,句意：这些一许多实验为基础的研究结果令人信服。故选B。