------ Henry doesn’t seem like the same person.

------ ________ so much in the war has made him more thoughtful.

A．For him to see

B．His seeing

C．Having seen

D．To have seen

下列关于MDI子窗体在运行时特性的叙述错误的是( )。

A．子窗体在MDI窗体的内部区域显示

B．子窗体可在MDI窗体的外部区域显示

C．当子窗体最小化时，它的图标在MDI窗体内显示

D．当子窗体最大化时，其标题与MDI窗体标题合并，并显示在MDI窗体的标题栏