根据对话内容，从下面方框所给的选项中选出合适的句子补全对话。

Alice: Hello?

Susan: Hello. 1______

Alice: Yes, it is.

Susan: 2______ Would you like to go to the bookstore with me tomorrow? I'd like to buy some books.

Alice: Sorry. I don't need any books. 3______ I can read books on the Internet.

Susan: Yes, but you can't always read on the computer. 4______

Alice: Oh, I see.

Susan: And in the bookstore we can find many wonderful books.

Alice: OK. I'll go with you. 5______

Susan: What about three o'clock tomorrow afternoon?

Alice: Great. See you then.

Susan: See you.