根据下面所提供的对话情景，在每个空白处填入一个适当句子，使其意义连贯、完整。

A: Look at this photo of my family. This is my father and this is my mother.

B: (1)__________________________

A: It's my little brother.

B: He looks very clever.(2) ______________________________

A: He is six years old. Look! He is riding a bike.

B: Could you ride a bike when you were six?

A: No, I couldn't.(3)________________________________

B: I could when I was six. And I rode well.

A: By the way. (4)________________________________

B: No, thanks. I'm not thirsty.A:What about some moon-cakes?

B: (5)_________________________ Oh, they are delicious. Thank you.