一道英语阅读题（高中水平）

一道英语阅读题（高中水平）
先说题目好了,09年北京卷A篇
57.Upon leaving for America the author felt_______.
A.confused B.excited
C.worried D.amazed
I began to grow up that winter night when my parents and I were returning from my aunt's house,and my mother said that we might soon be leaving for America.We were on the bus then.I was crying,and some people on the bus were turning around to look at me.I remember that I could not bear the thought of never hearing again the radio program for school children to which I listened every morning.
I do not remember myself crying for this reason again.In fact,I think I cried very little when I was saying goodbye to my friends and relatives.When we were leaving I thought about all the places I was going to see-—the strange and magical places I had known only from books and pictures.The country I was leaving never to come back was hardly in my head then.
首先我有一点不明白,第一段说他不能忍受离开家,在车上都哭了,但是第二段又说他想象目的地（这里是指将要去的美国吗?我不太理解）的美好景色,并且丝毫不在乎将要离开家乡（The country I was leaving never to come back was hardly in my head then 是这个意思吗?）,不太理解作者到底什么心情.这道题答案是excited,怎么看出来的?
如果可以,把这两段的意思给我讲一下,另外“The country I was leaving never to come back was hardly in my head then”这句话什么意思?
那第一段哭是怎么回事？那是哪个时间点？