Was it in the library ________ he often went to do some reading ________ he meet the pretty girl?
A.that; thatB.where; whereC.where; thatD.that; where在线课程C
本题强调句型It is/was+被强调部分+that/who+其他部分，关键在于本题题干中出现两个空格，切忌题目尚未读完就下定论，仔细审题会发现library后面是个定语从句，由关系副词where引导，第二空才是强调句中的that，本句意思是“他是不是在常去读书的图书馆里遇上那个漂亮女孩的？”