A. Hi ken! Are you busy now?
B: Yes I'm a little busy.
A: ?
B: I'm thinking about shopping for a birthday gift for my sister online.
A: ?
B: No. I never shop online so I don't know how to do that.
A: Oh, I shop online all the time.
B: ?
A: I think it's faster and the things online are cheaper.
B: OK. Come and help me. Let's look at my computer together.
A: ?
B: I want to buy a book.
A: OK. First, let's find a website (网站). Lots of sites sell books.
B: OK, sounds good.
A: ？
B: Books about history. My sister likes reading them.
A: OK. Let's look for history books.
B: Wow! There are lots of books. How can I choose just one?
