听力原文：M: Have you done the lab experiment for physiology yet--the one on taste?W: Yeah, it was kind of fun--mapping the taste buds. Didn't you think so?M: I'm doing it this afternoon. How long will it take?W: It went pretty quickly--under an hour, anyway. See, first you mix up the four solutions.M: You take water and add either sugar, lemon juice, salt, or... uh... What was it?W: Bitter quininE.M: That's it... uh... then what?W: Then all you have to do is taste each sample and describe where each flavor seems most intensE.M: Is that hard?W: Not really. One thing to remember though--not all the taste buds are on the tonguE.M: Right. I'll keep that in minD.And thanks for going over this with mE.Maybe we could talk about this after I've tried it--we could get a pizza or something.W: Great. Give me a call.(20)A.To see how certain chemicals produce different flavors.B.To determine if a person can distinguish salty and sweet solutions.C.To map the location of taste buds.D.To count the number of taste buds.
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(20)
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