中秋节的传统食物是月饼，一种有馅的圆烤饼。

A.Traditional food of Mid-autumn Festival is moon cake, a round baked cake with fillings in.

B.The traditional food of the Mid-autumn Festival is moon cake, a round baked cake with fillings in it.

正确答案：The traditional food of the Mid-autumn Festival is moon cake, a round baked cake with fillings in it.