3.The boxer_____ his opponent in the second round.A) hanged up B)turned off C) knocked out D)head
问题描述：
3.The boxer_____ his opponent in the second round.A) hanged up B)turned off C) knocked out D)head
答
应填
knocked out 击败（对手）使……出局
通常是指有回合的比赛
这里是说拳手在第二回合出拳击败对手
ex:The boxer was knocked out cold.