【题目】If you________ the failed experiences, you would not havemade such a mistake in your homework.

A. refer to B. have referred to

C. referred to D. had referred to

【答案】D

【解析】试题分析：考查虚拟语气。表示假设的虚拟语气，用在对过去事实相反的假定上，从句用过去完成时had+过去分词，主句用would/should/might/could+have+过去分词。Refer to是一个固定结构，意思为查阅、参考。该句意思为：如果你参考一下这些失败经验教训的话，你就不会在你的作业中犯下如此的错误。故选D。