为下列句子排序，组成完整的对话。

    1   Hi, Sarah. What are you going to do this weekend?

I'm going to visit my uncle and aunt.

Oh, I miss my uncle and aunt, too. Where do they live?

By train.

How do you get there?

They live in Beijing. Their home is next to the Beijing Zoo.

I'm going to the science museum! Let's go together!

Where are you going this afternoon?

    9   OK!