单选题 下列程序的功能是在监控台上每隔一秒钟显示一个字符串"Hello"，能够填写在程序中横线位置，使程序完整并能正确运行的语句是( )。
public class Test implements Runnable
public static void main (String[ ] args )
Test t =new Test( );
Thread tt= new Thread(t);
tt. start( );
public void run ( )
for(; ; )
try

__________;

catch (__________ e )


System. out. println (" Hello" );