根据短文内容选择答案完成句子。

Dear Mary,

Today was my first day in Guangzhou, China. I live in a big flat with my family. I learned something interesting about this city. Let me tell you now. Guangzhou is big. There are many beautiful parks here. People take exercise in the parks. It's spring now.The weather here is nice. It's warm. The trees are green and the flowers are colorful. Guangzhou is called(被称为) “Flower City”. People usually take photos under trees or beside flowers. Guangzhou is also called “Food Capital”(美食之城). I can have many delicious foods here. Do you want to come to Guangzhou? Hope to see you this autumn（秋天）in Guangzhou.

Yours,

Sally