从方框中选择正确的句子补全对话。

A. When are you going to have the party? B. Let's go to the supermarket together. C. What are you going to buy? D. Yes, I am. E. Where are you going?

David: Hello, Tony.

Tony: I am going to the supermarket.

David:

Tony: I am going to buy some balloons, candy and a big cake for my birthday.

David: Are you going to have a birthday party?

Tony: Would you like to come to my party?

David: Sure, I'd love to.

Tony: This Saturday.

David: Great. And I can carry things for you. Let's go.