题目内容：

根据上下文补全对话，每空可以填词或句子。

A: 1.____________________________?

B: I’m reading a book.

A: 2.____________ the book before?

B: No, never.

A: 3.__________ have you had it?

B: I’ve had it for two days.

A: 4.________________ the book?

B: It’s interesting.

A: Can you 5._______ it to me after you read it?

B: Certainly.