61.Researchers have spent five years collecting datathe study was based.

A. on that

B. in which

C. in that

D. on which

正确答案：D

解析：

61.【翻译］研究者们花费了五年的时间收集这项研究依存的数据【精析】D分析句子结构可知，data后面是一个定语从句。be based on sth.为固定短语，意为“以……为基础、根据”，所以应用on which来引导从句。that引导定语从句时，不能位于介词后面。故选D —

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