我是售货员 I am a shop assistant

我是售货员。我卖书在一个大书店----->(我在一个大书店里卖书)。书在那是很贵--->(那里的书很贵)。我（想）要有 一个小店在波兰。我（想）要（在我的店里）卖便宜书和便宜光盘在我的店。

I wanted to write:
I am a shop assistant. I work in a big bookstore. Books in there are expensive. I want to have a small shop in Poland. I want to sell cheap books and cheap CDs in my shop.

我是售货员 I am a shop assistant

我是售货员。我卖书在一个大书店。书在那是很贵。我要有 一个小店在波兰。我要卖便宜书和便宜光盘在我的店。

I wanted to write:
I am a shop assistant. I work in a big bookstore. Books in there are expensive. I want to have a small shop in Poland. I want to sell cheap books and cheap CDs in my shop.

我是在一家大书店工作的店员，那里的书价格昂贵，所以我想在波兰开一家小商店，这样我就能在我的店里出售价格低廉的书和光碟

我是售货员 I am a shop assistant

我是售货员。我卖书在一个大书店。书在那是很贵。我要有 一个小店在波兰。我要卖便宜书和便宜光盘在我的店。

I wanted to write:
I am a shop assistant. I work in a big bookstore. Books in there are expensive. I want to have a small shop in Poland. I want to sell cheap books and cheap CDs in my shop.

我是在一个大十点工作的店员，这里的书都非常的贵，所以我想在波兰开一家小书店，这样我就能在我的店里出售便宜的书和光碟。

我是售货员 I am a shop assistant

我是一个售货员，我在一个大书店卖书，书在那里很贵。我想在波兰有一个自己的小书店，我要卖便宜书和便宜光盘在我的店。

I wanted to write:
I am a shop assistant. I work in a big bookstore. Books in there are expensive. I want to have a small shop in Poland. I want to sell cheap books and cheap CDs in my shop.

我是售货员 I am a shop assistant

我是售货员。我卖书在一个大书店工作。书在那里的书是都很贵。我想要有一个小店在波兰。我想要在我的店里卖便宜书和便宜光盘在我的店。 

I wanted to write:
I am a shop assistant. I work in a big bookstore. Books in there are expensive. I want to have a small shop in Poland. I want to sell cheap books and cheap CDs in my shop.