一定很拥挤ItMustBeCrowdedIt Must Be CrowdedA teacher is telling his students, “The moon is very large. Several millions people can live there.”And a boy laughs and says, “It must get crowded when its a crescent moon.”一定很拥挤 一位告诉学生：“月亮非常大，上面能住几百人。”一个男孩笑着说：“当月亮变成月牙的时候，住在上面的人该多拥挤啊！”