题目内容
【题目】“C your mind on your textbook, Jack! You've wasted too much time daydreaming!” the teacher said angrily in class.
【答案】Concentrate
【解析】句意:专心于课本,杰克!你浪费了太多时间做白日梦。concentrate one's mind on固定短语,“专心于......”,可知答案为Concentrate。祈使句,注意大写开头。
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