He always comes to school_______of all because he has to open the door for others.
A.earlier B.the most early C.most early D.earliest
D
【解析】
句意:他总是所有人当中到校最早的,因为他必须为别人开门。考查副词的最高级。根据题干中的“of all”所有人,可知这是最高级的标志,early的最高级是earliest,副词的最高级前面可以省略the,故答案选D。