It was playing puter 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
网友回答
A解析考查强调句型和定语从句。考查强调句型。It is/was 被强调成分that/who其它成分；这是强调句型的基本结构。强调句型最大的特点就是把it is/was…that/who去掉，句子仍然成立。第一空强调playing puter games.第二空是定语从句，that指代先行词plenty of time作为spend的宾语。