31. A)A German baker. B)An American seller.

　　C)A popular expression. D)A German dog.

　　Passage Three

　　Questions 32 to 35 are based on the passage you have just heard.

　　32. A)A student. B)A librarian.

　　C)A teacher. D)A part-time assistant.

　　33. A)Both research and chores. B)Only to feed the birds.

　　C)Only to clean cages. D)To dissect (解剖)pigeons.

　　34. A)A month later. B) Saturday. C)Two hours later. D)After the class.

　　35. A)To be comfortable. B)To see her after the class.

　　C) To be interested in her lesson. D)To study pigeons.

　　Section C

　　Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written.

　　Some living creatures may (36)______________ the effects of cold by moving elsewhere (e. g. birds, fish) or by (37)______________ movement (e. g. bees). Others may die when the cold weather (38)_______________(e. g. land insects).

　　Many mammals (39)______________ the winter through the process of hibernation (from the Latin word meaning winter). One type of hibernation is known as (40)______________ hibernation. This is brought about by the activation of a (41)___________ called H. I.T. in the animal' s blood. The temperature of the animal falls and metabolism is (42)____________ The respiratory and heart (beat) rates (43) ___________ dramatically and the temperature falls (44)__________________________________________. However, the animal will be awakened by a special control system if it is danger of freezing and may also wake for a short to excrete waste substances or to eat.

　　(45)______________________________________________________________ . Energy is provided at the end of hibernation by the animal's store of brown fat. Some creatures do not actually hibernate, but enter a state of torpor. They show similar metabolic changes, (46) ______________________________________________________________.