Was it in 1997 he was still at middle school this boy became an expert at puter?
A. that; where
B. when; where
C. in which; in which
D. when; that
网友回答
A. that; where
B. when; where
C. in which; in which
(答案→)D. when; that
解析：句意：那是在1997年他在中学的时候，这个男孩成了电脑专家。这里是强调句型，其结构是It was+被强调部分+ that+其他，判断强调句型的方法是把It was that去掉整个句子不缺成分，是成立的。这里被强调部分是in 1997；第一空是when引导的定语从句，when he was still at middle school，它在从句中作状语，修饰前面时间；第二空是强调句型中的that，故选D。