A、Reminding the man of their mom’s birthday. B、Asking the man to help him book an air ticket. C、A big fire in Hong Kong yesterda

W: So this is the Internet?
M: Well, it’s the World Wide Web, which is part of the Internet.
W: Wow… and, uh, what do you use it for?
M: Oh, well, I can sit here in my office and do almost anything.
W: Like what?
M: Well, this morning, the first thing I did when I got up was to turn on the computer. In a couple of minutes, I was reading the newspaper from Chicago.
W: Wow.
M: Yeah, you can read hundreds of newspapers from around the world.
W: That’s amazing.
M: That’s just the start. Then I checked my e-mail. There was a message from my dad in Chicago, one from my sister in San Francisco, and a message from my brother in Hong Kong. My dad’s message was to tell me not to forget my mom’s birthday. So then I sent her an electronic birthday card.
W: An electronic birthday card?
M: Uh-huh.
W: Fantastic.
M: My sister wanted to know if I was planning to visit her in San Francisco during my vacation.
W: So…, are you?
M: Well, I checked an airline reservation service. I looked at the schedule and picked a flight, booked it, and sent the information to my sister. After about an hour she sent me a reply saying she’d pick me up at the airport.
W: Oh, my gosh! And how about your brother’s message?
M: Well, he told me about a big fire in Hong Kong yesterday, and I wanted to find out more about it. So I checked an Internet news service and I saw video footage of it.
W: No way! You can see video images through your computer?
M: Absolutely sure. Amazing, isn’t it?
Questions 22 to 25 are based on the conversation you have just heard.
22. Where does the conversation take place?
23. What was the first thing the man did when he got up this morning?
24. Where does the man’s sister live?
25. What is the message from the man’s brother mainly about?