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.
