—I am going to Sanya with my family for the National holiday. 

— _________.[ ]

A. That's not a good idea.  

B. Good luck.    

C. Take care.    

D. Have fun.

将一个窗体设置为MDI子窗体的方法是

A．将窗体的名称改为MDI

B．将窗体的MDIChild属性设为True

C．将窗体的MDIChild属性设为False

D．将窗体的Enabled属性设为False