*Both I hope.I want to be involved from start to finish.

*Are you getting paid for this?

*I'm sure we'll get something though,probably not much.Anyway it doesn't matter to me,I just want to have some hands-on experience.

*Yeah.And it'll be nice to help those high school students too.

*That's what I thought when I saw the ad.You know you could do it too.You don't have to be in her classes to work on the study.

*Really?Do you have any idea what the schedule is like?

*Late afternoon then evening for tutoring I think.After all the kids are in regular classes until three thirty.

*Actually that's perfect for me.

*Then come along.We will save the lab report for later.But we'd better make sure we do a good job on our experiment first.

*Yeah.First thing's first.

35.What are the speakers mainly discussing?(D)

36.Why is the woman interested in working with Professor Smith?(B)

37.What will the college students do for the high school students?(C)

38.What will the speakers probably do next?(D)

PART C

39to 42A museum guide talking about native American pottery.

Hello,I'll be your tour guide today here at the art museum so I'd like to welcome you to this month's exhibit of native American pottery.We'll begin our tour in a few minutes.But first I'm going to tell you something about the way this pottery was created.Pottery was made all over ancient North America by many different groups of people.One of the earliest of these ancient American cultures was the Hohokam people.They lived in what is now Arizona from about 300BC to AD 1500.And it's their pottery that you will be looking at today.All of the pottery was made from clay.Some objects were mug,bowls and ladies for drinking and eating.You will also see finger rings and animal-shaped incense burners which we believe were probably used in special ritual.The Hohokam formed their pottery vessels from coils of clay.Then shaped them with special tools to create very thin sides on the vessels.Afterwards they painted the pottery with red design.Actually many of the pieces here have designs right on them that show how the pottery was used.Now I hope you'll enjoy the beauty and the uniqueness of the Hohokam pottery and that will give you some interesting insights about the people who created it.Please feel free to ask me any questions and thank you for joining us today.

39.What does the speaker mainly discuss?(C)

40.What is the purpose of the talk?(B)

41.What did the Hohokam do with their pottery?(B)

42.What does the speaker say about the way the hohokam pottery was made?(A)

43to 46A talk in an American history class.

I'm going to introduce two current points of view about the motivation for writing the United States Constitution back in 1787.The first one is called the idealist view.The idealists basically believe that the writers of the Constitution were motivated by ideas.Which ideas?The ideas of the revolutionary war,such as liberty and democracy.The idealists remind that the young country had a lot of problems:an economic depression,a large war debts,lawlessness and trade barriers between the states.They argue that the representatives needed to control these problems in order for the United States to survive.The other point of view is the economic view.The economic view is that the writers of the Constitution were concerned about their own financial interests.According to them most people were living wealth for the wealthiest people were afraid of losing their money.The writers wanted a strong central government that would promote trade protect private property and perhaps most of all collect taxes to pay off the United States'large war debts.Because a number of those who wrote the constitution had loaned money to the government during the revolution.Which view is correct?Well historians who wrote during the calm and prosperous 1950s found reasons to believe the idealist view.Those who wrote during the trouble of 1960s found support for the economic view point.I'd say that neither view is complete,both the idealist and the economic perspective contribute a part to the whole picture.

43.What is the talk mainly about?(D)

44.According to the economic view,who benefited the most from the new Constitution?(B)

45.What can be inferred about the views of the historians ?(C)

46to 50Part of a speech on birds by a biologist.

Many egg-laying animals merely lay their eggs and leave.Turtles for instance,the eggs hatch on their own.The current theory about birds is that the earliest birds did just that when they were cold-blooded creatures living in warm places.However when they became warm-blooded creatures living in cold places they had to remain on the eggs to keep them warm.The process we call incubation.For this they needed a place a nest.Very likely the first nests were just primitive depressions scrape into the ground.Even now many species still lay eggs in this sort of crude nests.In fact every spring a mother killdeer lays her in some pebbles along the edge of the parking lot just outside this building.Primitive nests on the ground were fine for some birds but others began to elevate their nests in branches perhaps to avoid predators.These early elevated nests were probably loose platforms of sticks and twigs the types still built by ospreys and mostarians today.The latest evolvement in nest the most recent version,so to speak,is the cup-shaped nest.This is the one we regard today as the typical bird's nest,you know,like a robin's nest.

46.What is the main topic of the talk?(C)

47.What evolutionary change in birds led to nest building?(B)

48.According to the speaker,where were the first bird's nests located?A)

49.What is the killdeer's nest in parking lot an example of?(A)

50.According to the speaker,what is a possible reason that birds began to build nests in trees?