题目内容：

根据短文内容，用适当的单词或句子补全对话。

A: You look unhappy. 1.___________________?

B: I argued with my friend.

A: Would you mind talking about it to me?

B: 2.__________________. It all started when I lost his camera. You know, his mom got it for him as     his 15th birthday gift.

A: Oh, I see. 3.___________________________?

B: A new camera? It’s too expensive. I don't have enough money.

A: Maybe you can go to the lost and found to look for it

B: 4.__________________. I nearly forgot. I’ll go there at once.

A: Good luck!

B: 5..___________________.

A: You’re welcome.