阅读下面的对话，然后根据对话内容补全句子。

Peter: Can I come in, Alice?

Alice: Yes, please.

Peter: Is this your pen?

Alice: Yes, it is. What’s that(那个) on the desk?

Peter: It’s a book.

Alice: Is it your book?

Peter: No, it’s Zhang Hai’s.

Alice: Who(谁) is Zhang Hai?

Peter: He is my classmate.

Alice: I see. How about your book?

Peter: It’s in my bag. What’s this in English?

Alice: It’s a ruler.

Peter: Thank you. Goodbye.

Alice: Goodbye.

1. The p____________ is Alice’s.

2. Zhang Hai’s book is on the______________.

3. Zhang Hai is Peter’s________________.

4. _____________ book is in his bag.  

5. 划线部分句子的意思是：

_____________________________