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46、 According to the passage, which of the following statements is true?
A． Black stands for unhappines
B． Black makes people think of nigh
C． Black makes people think of sorro
D． Black is the color of the mournin

47、根据以下资料，回答47-66题。 　　The traffic lights were red when the driver reached them．To the surprise of his passenger, the ear did not slow down．Unexpectedly the passenger was thrown forward in the vehicle as the driver put on his brakes at the last moment．The car stopped just in time.
　　"Sorry, I didn't notice the light．I thought it was green until I saw that it was the top light which was shining."
　　This strange story is quite true．About ten men in every hundred are color blind in some way; women are luckier-- only about one in two hundred suffers from color blindness.
　　In some cases, a man may not be able to see deep red．He may think that red, orange and yellow are all the same as green.
　　People often like one color more than others．Blue is the color of the sky and sea．Green makes us think of fields and trees．Red is the color of blood and makes some people think of danger．Black is the color of night．In the dark we cannot see what is around us so we are sometimes afraid of the unknown and do not like black as a color.
Among the traffic lights, red light is placed __.
A． at the bottom
B． in the middle
C． at the top
D． below the green light

48、 Who was the first president to have a dog in the White House?
A． Bill Clinton
B． John Kennedy
C． Dwight Eisenhower
D． George Washington

49、 Where does Landau live?
A． Washington, DC
B． Manhattan, New York City
C． Baltimore, Maryland
D． White House

50、根据以下资料，回答50-69题。 　　Of all Barry H．Landau's anecdotes about his friendships with presidential dogs, perhaps the best is the one about the time the Clinton White House called to postpone his play-date with Buddy．
　　Yes, Landau is both human and an adult, a 60-year-old author, presidential historian, former White House protocol officer and memorabilia collector．But so enamored is he of dogs, and so well connected to a succession of presidents, that he had an appointment for a South Lawn romp one day with Buddy, Bill Clinton's Labrador retriever (拉布拉多犬) .
　　Logistics got in the way, though, and hence Clinton secretary Betty Currie's apologetic voice mail left at the Smithsonian Institution, where Landau was doing research: "I'm sorry, but we'll have to reschedule Mr．Landau's play-date with Buddy."
　　Not surprisingly, this is a happy week for Landau, with the new Obama family dog, Bo, joining a White House tradition that dates to George Washington．It's one that Landau feels is invaluable to a presidency.
　　"Having a dog just humanizes a president," he says．"It completes the picture．It's something people can relate to."
And Landau has related to the best of them．He's known about 25 White House dogs since the Eisenhower administration．Among the presidential-pooch memorabilia in his Manhattan apartment are matching orange inaugural dog coats worn by LBJ's twin beagles (小猎犬) , Him and Her, and a photo of Landau kissing Clipper, JFK's German shepherd.
Who's "Buddy"?
A． Barry Landau's friend
B． Betty Currie's cousin
C． Bill Clinton's dog
D． George Washington's play-dat

51、 According to Landau, why is it important for a president to have a dog?
A． It increases his chances of being reelecte
B． It humanizes the president, making him easier to relate t
C． It shows that the president can care for an anima
D． It is the tradition of White House as a presiden

52、 Why might the increasing number of whales cause problems with their health?
A． There's not enough room for them in Alask
B． There may not be enough food for them in Alask
C． They get pushed ashor
D． There are more whales to spread diseas

53、 One reason it is difficult to know why the whales are dying is that __.
A． the whales travel such a long distance
B． there are more whales than there used to be
C． the whale bodies are too old to study by the time they are found
D． the whales are endangered

54、 About how many more whales have been sighted in the San Francisco Bay this year compared to last year?
A． Twice as man
B． Three times as man
C． Half as man
D． About the sam

55、根据以下资料，回答55-74题。 　　Every year gray whales migrate from the Bering Sea in Alaska to the Baja Peninsula in Mexico.
　　Eleven gray whales have died in the San Francisco Bay in the last three weeks．No one knows why the whales are dying.
　　Last year 270 whales died along the whales' migration route．Many people think starvation is the cause．This year the dead whales seem to have more blubber (fat) on them.
　　Twenty years ago, the gray whale was listed as an endangered species.
　　Some scientists think that the larger number of whales makes it hard to find enough food．More whales create more pressure on the food supply, a supply that some scientists say may have dwindled as a result of the warm waters of El Nino.
　　Most of the whales have been dead for many days before they are found and studied．This makes it hard to find the reason for death.
65 whales have been seen in the San Francisco Bay Area this year compared to 17 last year．The whales could be dying from many diseases, but it may be over-population． Which of the following is NOT a possible reason for whales dying?
A． Pneumoni
B． Brain infectio
C． Over-populatio
D． Over-eatin