看图，完成对话。 1. A: Is this a pen? B: No,___

问题：

看图，完成对话。

1. A: Is this a pen?                    

    B: No,________  ________ .

    A: What________ ________ ?

    B:________  Is________ ________ .

2. A: What________ ________ ?  

         Is it a________ ?

    B: Yes, it is.

3. A:________ that?                  

    B: It's a_________.

    A: ________ do you spell it?

    B:________.

4. A:________ ________ .Is that a baseball?

    B: No, it isn't. It's a ________ .