阅读理解

It is Sunday afternoon. Mary goes to do the shopping with her mother because today is Mary's sister—Lily's birthday. Her mother wants to buy some food for the birthday party. Mary wants to buy a new skirt and some school things. They come to a shop.

"What does your shop have?" Mary asks."A lot of things," the girl in the shop says."You can buy food, drinks, clothes in our shop and school things too."

Mary and her mother go in.There are many people in the shop.Mary finds a nice white skirt.

"How much is the skirt?" Mary asks the girl in the shop.

"It's 80 yuan."

"That's too expensive. Can I find a cheap one?"

"What about the green one? It looks nice. And it's only 30 yuan."

"OK, thanks a lot."

"You are welcome."