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! ，能够填写在程序中下划线位置，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 );
A．sleep(1000)
InterruptedException
B．sleep(1000)
InterruptedException
C．Thread.sleep(1000)
RuntimeException
D．Thread.sleep(1000)
InterruptedException