问题
排序题
读下列对话，按发展顺序排列。
1. Happy birthday!
2. Hello, Sarah. This is my friend, Wu Yifan.
3. Thank you.
4. Let's eat the birthday cake.
5. How old are you?
6. Great!
7. I'm nine.
正确顺序: ___________________________________________________
答案
2 1 3 5 7 4 6