专八改错练习第二十七篇：

Some people say love makes the world go around.
Others say it is not love; it's money.Since the __1__
truth is that it is energy that makes the world
go around. Energy is the currency of the ecological
system and life becomes possible even when food is __2__
converted into energy, which in turns is used to seek
more food to grow, to reproduce and to survive. In this __3__
cycle all life depends. It is fairly well known that
wild animals survive from year to year by eating as many as __4__
they can during times of plenty, the summer and fall,
storing the excess, usually in the form of fat, and then
using these reserves of fat to survive during the hard time __5__
in winter when food is scarce. But it is probably less well
known that even with their stored fat, wild animals spend
less energy to live in winter than in summer. A good case
in point is white-tailed deer. Like most wildlife, deer __6__
reproduce, grow,and store fat in the summer and fall
when there is plenty of nutritious food available. A
physically mature female deer in the good condition who __7__
has conceived in November and was given birth to two fawns __8__
during the end of May and first part of June, must search
for food for the necessary energy not only to meet her
body's needs but also to reproduce milk for her fawns. The __9__
best milk production occurs at the same time that new plant
growth is available. This is good timing, because milk
production is an energy consuming process -- it requires
a lot of food. The need can be met unless the region has __10__
ample food resources.
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