Who was ( ) the ball.1.playing 2.play 3.played 4.plays

问题描述:

Who was ( ) the ball.1.playing 2.play 3.played 4.plays

填 playing
谁(那时)正在踢球?was��˭�Ĺ�ȥʽ����������is�Ĺ�ȥʱ��