12、
A．Human beings suddenly appear before them.
B．Some unexpected animals step into the bush.
C．There are loud noises coming from many people.
D．They are hungry and are looking for food.


13、
A．By keeping silent.
B．By speaking lousy. 
C．By walking quickly. 
D．By standing still.
Questions 13 to15 are based on the conversation you have just heard.


14、
A．He forgot to read the requirements.
B．He forgot to copy one document required.
C．He forgot to carry the document required.
D．He forgot to bring the copy of a document required.


15、
A．He has already got the result.
B．He took it two weeks ago.
C．The result is still unknown.
D．The test will be available.


16、
A．The certificate and the passport.
B．The application and the results.
C．The documents and the application..
D．The evidence of the financial status.
Questions 16 to19 are based on the passage you have just heard.


17、
A．It has become extinct.
B．Its number will increase continually.
C．It is taken off the endangered-species list.
D．It is America's national symbol.


18、
A．It weakened their eggshells.
B．It poisoned their habitat.
C．It killed them directly.
D．It killed all the fish they feed on.


19、
A．Reintroduce them from Europe.
B．Make a ban on killing them.
C．Feed them on uncontaminated fish.
D．Pass a law to ban DDT.


20、
A．DDT.
B．The disturbing of nests.
C．Hunting.
D．The destruction of their natural homes.
Questions 20 to 22 are based on the passage you have just heard·


21、
A．They realize the importance of keeping fit.
B．There are too many traffic jams.
C．The economy is slowing down.
D．Gas is in short supply.


22、
A．To reduce the percentage of bike riders.
B．To create special lanes for bike riders·
C．To make the city beautiful and green.
D．To reduce environmental pollution.


23、
A．He has never driven his own car to work
B．He moved to Washington，D.C.6 years ago.
C．He was hit by a car twice in Portland.
D．He now lives in Washington，D.C.

Questions 23 to 25 are based on the passage you have just heard.


24、
A．Surgeons were not sure of the risk of operation.
B．It’s very hard to find a suitable organ donor.
C．Human body was not receptive to foreign tissue.
D．Patient’s white blood cells would be destroyed.


25、
A．The donor and recipient are identical twins.
B．The transplanted organ is from the recipient’s relatives.
C．The donor's blood type is the same as the recipient’s.
D．The recipient is not infected during the operation.


26、
A．They tried to make the transplanting safer.
B．They shifted their attention to “nonessential” parts of the body.
C．They focused on transplanting several organs at one operation.
D．They did research to develop less expensive anti-rejection drugs.

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