问题
选择题
With all his attention ____ on the computer game, the boy even didn't notice his mother came in.
A．was fixing
B．was fixed
C．fixing
D．fixed
答案
Ｄ
考察with复合结构。With好妹妹不能加句子，排除AB。With符合结构：With+宾语+宾语补足语，his attention与fix构成被动关系，使用过去分词表示被动。故D正确。