三、跨学科 请根据车厢上的数字找出规律，在空白车厢内填写正确的英文数字单词，补齐车厢，让小火车们顺利出发吧。
1. four eight sixteen twenty
2. one five nine thirteen
3. three seven fifteen

1. twelve 2. seventeen 3. eleven; nineteen

四、地域文化 两位来西安旅游的游客正在聊天。请依据逻辑为句子排序，组成一段完整、通顺的对话。
I'm from Hanzhong. What about you?
Hi! I'm Li Hua. What's your name?
Thank you.
I'm from Baoji.
My name's Chen Jie. Where are you from?
I'm so glad to meet you at Dayan Pagoda. Have fun!

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