A、Looking at some photographs. B、Selling cameras. C、Teaching a photography class. D、Repairing camera equipment. A从选项猜测，肯定会问这两个人在

M: (19)Did you take these pictures? They’re very good.
W: Yes, I think they turned out well. too. I like to take my camera with me wherever I go. That way, if I see something interesting, I can snap a picture of it.
M: (20)Carrying a big camera around is too much trouble for me.
W: My camera is really small, though. Here, let me show you.
M: That is a compact camera. But you really must know a lot about photography to get such professional looking results.
W: Not necessarily. This camera is simple to operate.
M: Does this model come with a flash attachment for indoor shots?
W: Better than that. (21)It has a built-in electronic flash. and focusing.
M: That’s what I need. (22)When I take pictures they usually come out blurry because I don’t adjust the lenses popery, and I hate photos that are out of focus. Is a camera like yours very expensive?
W: Less than you’d expect. Why don’t you cheek the prices at Hatfield’s down the street? This model was on sale there last week.
M: I think I will. It certainly won’t hurt to take a look.