问题
选择题
It was playing computer games_______ cost the boy plenty of time______ he ought to have spent doing his homework.
A．that; that
B．which; that
C．which; when
D．that; when
答案
答案：A
这题考查强调句，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引导句意是：就是玩电脑游戏花了男孩本来应该花来写作业的时间。选A。