in the front of后面加什么

　　Id like to sit in the front of the plane.

　　我要坐在飞机前部。

　　The girl is standing at/in the front of the bus.

　　这个女孩站在公共汽车的前部。(在车内)

　　Why does Barth put this in the front of his story?

　　为什么巴斯在书的第一页要放这个呢？