题目内容

The findings of the research, _________ on a lot of experiments, are convincing.
A．to baseB．basedC．is basedD．basing
B
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。
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