选择适当句子的序号填到横线上。

1. Thank you! 2. Hello, Daming. 3. I don't know. 4. No, it isn't.

Daming: Hello, Sam!

Sam:

Daming: Where's the cat?

Sam:

Daming: Is it in the yellow bag?

Sam:

Daming: Is it in the green bag?

Sam: Yes, it is. Here you are!

Daming: