Please choose the correct ending to complete the given sentence: Ping-pong: A young man ring a flat bell on front a ping pong table. The young man and person move around the ping pong racket. then

Ending1: , the man and person continue talking after the person's exit. Ending2: , the young man serves the ball and both start to play. Ending3: , the young boy fix the triangle and play it. Ending4: , the young man put two new rings on the bell.

Answer format: ending1/ending2/ending3/ending4