3.The boxer_____ his opponent in the second round.A) hanged up B)turned off C) knocked out D)head

题目

3.The boxer_____ his opponent in the second round.A) hanged up B)turned off C) knocked out D)head

答案

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.