2. The boy slipped out of the room and headed for the swimming pool without his parents' _____.

  A. command B. conviction C. consent D. compromise

  [答案] C. consent

  [注释] consent 同意, 赞成, 答应。conviction 深信, 确信。compromise 妥协, 折中。command 命令, 指令; 掌握, 运用能力。