Directions: This is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. You may not use any of the words in the bank more than once. Question 1 to 10 are based on the following passage. Wild animals survive from year to year by eating as much as they can in summer and fall, storing the excess in the form of fat, and then use their stored fat to survive the hard times in winter when food is scarce. But, even with their fat___1___, wild animals spend less energy to live in winter than in summer. ___2___ is the white-tailed deer. In summer, after they have given birth to fawn, physically mature female deer must search for growing plants which can be __3____ energy because milk production is an energy-consuming process. Both males and females continue to eat high quality food in the fall in order to ___4___ body fat which can be ___5___ in winter. As fall turns into winter, hair on all the deer becomes thicker, which provides ____6__ safeguard to help deer to survive the winter. In addition, and most important of all, deer have an internal ____7___ response which helps to slow down expenditure of energy by lowering their metabolism (新陈代谢) . If the winter has deep snow, which means the deer has to spend more energy to move about, they must then be more dependent on fat reserve to ____8___. Even if some small and weak deer die in the winter, their bodies become food for other life forms. ___9___ energy crisis, we still can pull through by following the deer: deer grow a winter coat of hair while we can put on more clothes stay warm. Deer lower their metabolism, while we can ___10___ the thermostat ( 恒温器 ) on the furnace. A. a good case in point B. converted into C. deposit D. turn down E. pull through F. drawan on G. external H. reverses I. mature J. production K. physiological L. In the case of M. influence N. superior O. metabolism