问题
选择题
With his attention _____ on his book, he didn’t notice me enter his study.
A．focusing
B．focused
C．to focus
D．focus
答案
答案：B
题目分析：考查with 的复合结构。题意为 他集中注意力到书，没有注意到我进行他的书房。Focus one’s attention on 集中精力于。With sth done/dong /to do ,focus与attention 之间是被动关系，故选B项。
考点 with 的复合结构