M: What are you looking at
W: Well, it is raining so hard outside. I have no umbrella.
W: Well, what are you going to eat The pork is very good here.
M: Umm…I had pork yesterday. I think I’ll have the beef.
M: What are you looking for
W: We’re studying the basic structure of molecules.
M: Just any molecules There are quite a few of them!
W: Yes, far too many. We’re only working with certain molecules that contain carbon and hydrogen.
M: What do you expect to learn from that
W: We’re trying to see the kinds of carbon molecules in which we can use silicon as a substitute.
M: What difference would that make
W: Silicon has a lot of the same properties as carbon, hut it’s much more common than carbon.
M: Oh, I see.
M: So, what do you want to do tomorrow
W: Well,let’s look at the City Guide here.Ah,here is something interesting. Why don’t we first visit the art museum in the morning
M: OK.good idea.And where do you want to eat lunch
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