Two scientists in California now think they can find out a person’s real age.Jeffery Bada and Patricia Masters do chemical tests on teeth.When we are born the amino acids（氨基酸）in our teeth are in one form.Then，as we grow older these amino acids change into a second form.Every year，one thousandth of the amino acids changed.So，by testing just one tooth and counting the number of amino acids in each form，Bada and Masters can work out a person’s age.They tested a tooth from the body of an Eskimo（愛斯基摩人）woman who died 1 600 years ago.From the appearance of her body，she was between 50 and 60 years old when she died.The tooth test put her age at 53.Then the Russian Government sent them a tooth from an old man in Georgia.The tooth said she was 99.Her real age was 96.The Russians are now hoping to send more teeth，from the very old people without birth certificates（出生證明書）.But there are problems.Some of the centenarians（百歲老人）have lost all their teeth.The others want to keep their teeth until they drop out naturally.So the Russian Government and the American scientists have to wait and hope.

61.Jeffery Bada and Patricia Masters believe that they can tell a person’s age according to_______.

A.an experiment on his bone

B.the shape and condition of his teeth

C.a test on the amino acids within his body

D.the changing form of amino acids in his teeth

62.According to the passage，which of the following statements is true?

A.The amino acids in an adult’s teeth may differ from those in a baby’s.

B.The number of amino acids in a 20-year-old man is different from that when he was seven.

C.Amino acids in one teeth changes without affecting their forms.

D.Scientists now can tell how long a person will live by testing his teeth.

63.Why are the two scientists asked to find out some very old Russians’ age?

A.Because the Government wants to know how long these old people can live.

B.Because they have no birth certificates.

C.Because people who have tooth problems tend to live longer.

D.Because the Government wants to know their dates of birth and death.

64.In order to find out the exact age of some people over 100，both the Russian Government and American scientists_______.

A.should wait until all of them die

B.should pull out one of their teeth

C.have to wait for their teeth to drop out naturally

D.want to have their teeth pulled out

65.The central idea of the passage is_______.

A.the relationship between people’s teeth and ages

B.the relationship between amino acids and teeth

C.the contradiction（矛盾）between scientists and patients

D.the contradiction between the Government and the scientists

She tried to_______laughing，but it didn’t work;the performer gave her an angry look at her.

A.prevent                            B.stop from                  C.stop                    D.keep

Four other students aren't in the classroom ____ Lin Tao.Where are they ?

A. but    B. except    C. beside    D. besides

It does no good ___ anything at such times.

A. saying   B. to say    C. being said    D. to saying

--___ you got to know my telephone number? ---Through a friend of yours.

A. How was it   B.How was it that   C. Was it how that   D.How did

So many directors ________, the board meeting had to be put off.

　　A. were absent　　　　　　　　　　B. been absent

　　C. had been absent　　　　　　　　 D. being absent

Young adult filmmakers all hope to show their works in international festivals like Sundance and Toronto. But what about really young filmmakers who aren’t in film school yet and aren’t, strictly speaking, even adults?

They are at the heart of Wingspan Arts Kids Films Festival, tomorrow, in a setting any director might envy: Lincoln Center. Complete with “red carpet” interviews and various awards, the festival has much in common with events for more experienced moviemakers, except for the age of the participants: about 8 to 18.

“What’s really exciting is that it’s film for kids by kids,” said Cori Gardner, managing director of Wingspan Arts, a nonprofit organization offering youth arts programs in the New York area. This year the festival will include films not only from Wingspan but also from other city organizations and one from a middle school in Arlington, Virginia. “We want to make this a national event,” Ms. Gardner added.

The nine shorts to be shown range from a Claymation biography of B.B. King to a science fiction adventure set in the year 3005. “A lot of the material is really mature,” Ms. Gardner said, talking about films by the New York City branch of Global Action Project, a media arts and leadership-training group. “The Choice is about the history of a family and Master Anti-Smoker is about the dangers of secondhand smoke.” Dream of the Invisibles describes young immigrants’ feelings of both belonging and not belonging in their adopted country.

The festival will end with an open reception at which other films will be shown. These include a music video and full-length film whose title is Pressures.

Wingspan Arts Kids Film Festival ____.

A. is organized by a middle school

B. is as famous as the Toronto Festival

C. shows films made by children

D. offers awards to film school students

Which of the following is true of Wingspan Arts?

A. It helps young filmmakers to make money.

B. It provides arts projects for young people.

C. It’s a media arts and leadership-training group.

D. It’s a national organization for young people.

The underlined word “shorts” in Paragraph 4 refers to _____.

A. short trousers  B. short kids   C. short films   D. short stories

Movies to shown in the festival ____.

A. cover different subjects.

B. focus on kids’ life

C. are produced by Global Action Project

D. are directed by Ms. Gardner

At the end of this film festival, there will be ____.

A. various awards    B. “red carpet” interviews

C. an open reception  D. a concert at Lincoln Center

　— Do you like a house with no garden?

　　　　—________ , But anyhow, it's better to have one than none.

　　A. Not really　　　　　　　　　　 B. Not especially

　　C. Not a bit　　　　　　　　　　　D. Not a little

It's clear that the thief was seen __ into the room that night.

A. went    B. go     C. going     D. to go

After studying in a medical college for five years, Jane         her job as a doctor in the countryside.

A. set out        B. took over            C. took up              D. set up