Поставить к предложениям вопросы! There are usually  two or three levels in a depatmen store.     

Shopping becomes a part of their trip and later a part of their memories.

what are there in a department store?

What becomes a part of their trip and later a part of their memories? 

1. There are usually two or three levels in a department store.

 Are ther usually two or three levels in a department store?

There are two or three levels in a department store , aren't there?

How many levels are there in a department store?

2 Shopping  becomes a part of their trip and later of their memories.

Does shopping become a part of their  trip and later a part of their memories?

Shopping becomes a part of their trip and later a part of their memories, doesn't it/

What becomes a part of their trip and a  later a part of memories?