[单项选择]Some animals apparently can resist cancer by strengthening their immune system in preparation for winter, Johns Hopkins researchers said on Wednesday.
The scientists said their study is the first to show that the central nervous system, reacting to environmental changes, may spark changes in the body’s immune system that control the growth of tumors.
They said if that is the ease, a better understanding of how the process works eventually could lead to new cancer treatments.
Dr. Randy Nelson, an associate professor of psychology at Hopkins, stressed at a meeting of the Society of Neuroscience that further study would be needed to confirm a connection between the length of the day, the animals’ immune system and cancer. More work also would be needed to show that the findings could be applied to human cancer.
Dr. Faye Austin, an immunologist with the National Cancer Institute in Bethesda, said: "It’s a very intriguing observation that the length of exposure t
A. Spring.
B. Autumn.
C. Winter.
D. Summer.

[单项选择]Some animals apparently can resist cancer by strengthening their immune system in preparation for winter, Johns Hopkins researchers said on Wednesday.
The scientists said their study is the first to show that the central nervous system, reacting to environmental changes, may spark changes in the body’s immune system that control the growth of tumors.
They said if that is the ease, a better understanding of how the process works eventually could lead to new cancer treatments.
Dr. Randy Nelson, an associate professor of psychology at Hopkins, stressed at a meeting of the Society of Neuroscience that further study would be needed to confirm a connection between the length of the day, the animals’ immune system and cancer. More work also would be needed to show that the findings could be applied to human cancer.
Dr. Faye Austin, an immunologist with the National Cancer Institute in Bethesda, said: "It’s a very intriguing observation that the length of exposure t
A. the findings of animals’ resistance to cancer can be applied to human cancer treatments
B. the length of exposure to light can affect the growth of a tumor
C. there is a relation between the length of the day, the animals’ immune system and cancer
D. there is a new approach for studying the function of central nervous system in the body’s immune system

[填空题]Not all crows (乌鸦) can talk. But some can. One crow that talks named Pick. Why Because he
picks things from people’s pocket. He’s pick-pocketer. 81 ______.
Sometimes Pick eats that he finds. But if he 82 ______.
finds nothing, he calls out, "Go to grass." 83 ______.
One day Pick played a joke on a farmer, that 84 ______.
was driving his horse on a field. Pick sat in a 85 ______.
tree. "Whoa "said the farmer. His horse stopped. Then, "Giddyap. "The horse started again.
But then comes Pick’s voice from the tree. 86 ______.
"Whoa. The horse STOPS. Go away. "called the farmer. 87 ______.
Pick lives with Mr. Beck for five years. 88 ______.
Then Mr. Beck moved to a big city. Pick returned 89 ______.
the woods, and his friends. 90 ______.