A、The most effective method of learning the German language. B、The popularity of online shopping using one’s personal computer.

M: Hey, Sally. I’m thinking about going to Germany this summer, and I need some advice. You’re the best person I know to answer my questions since you’re German.
W: What do you want to know?
M: Well, I met a really nice woman, Linda, through an online music mailing list, you know, a discussion group on the Internet. I need some advice. You see, she invited me to spend two weeks in Germany. And well, I told her I had studied a little bit about the country and language, and she’s kind of expecting that I know more than I really do.
W: Hum, you are really in trouble now! What do you want to know?
M: Well, she is planning on introducing me to her parents.
W: Hey. Sounds kind of serious.
M: It isn’t, at least I think it isn’t. Anyway, what should you do when you greet someone for the first time in Germany?
W: Well, it depends upon your relationship with the person. If you’re meeting someone formally for the first time, you should make sure you arrive on time.
M: Okay. What about common greetings?
W: Germans often shake hands, and use the person’s family name, unless they’re really close friends.
M: What about with Linda? I’m not sure what I should do in her case.
W: You can call her Linda, shake hands, and why not take her some flowers?
M: Oh, how do you say "Nice to meet you" in German anyway?
W: Honestly, I think you need to take an intensive course in the German language before you leave. Otherwise, Linda might think you’re speaking Japanese or something!
Questions 19 to 22 are based on the conversation you have just heard.
19. What are the two speakers talking about?
20. What do you know about the woman?
21. Where did the man meet Linda?
22. What does the woman suggest the man do before he leaves for Germany?