—Can you go to the movie with me tonight?  

—Sorry, I can’t. I__________ study  for the coming exams.     [ ]

A. can                    

B. may     

C. Would                  

D. have to

在Applet的关键方法中，下列哪个方法是关闭浏览器以释放Applet占用的所有资源

A．init( )

B．start( )

C．paint( )

D．destroy( )