一枚质地均匀的正方体骰子的六个面分别刻有1到6的点数,将这枚骰子掷两次,其点数之和是7的概率为____ .
Don't eat ____ (such/so) many hamburgers a day. It's bad for your health.
①衣着单一,质量较差 ②吃饱吃好,追求营养
③食品短缺,供应不足 ④交通发展,出行便捷