【题目】It was playing computer games _____ cost the boy plenty of time _______ he ought to have spent doing his lessons.
A. what; that B. that; when
C. which; that D. that; that
在线课程【答案】D
【解析】
试题分析：考查强调句和定语从句关系词。句意：就是玩电脑游戏花了男孩本来应该花来写作业的时间，强调的是playing computer games，第二空考查定语从句，先行词是plenty of time，定语从句中缺乏宾语用that引导，故选D项。