Part IV Error Correction (15 minutes) (共10小题；满分10分) Directions: This part consists of a short passage. In this passage, there are altogether 10 mistakes, one in each numbered line. You may have to change a word, add a word or delete a word. Mark out the mistakes and put the corrections in the blanks provided. If you change a word, cross it out and write the correct word in the corresponding blank. If you add a word, put an insertion mark (^) in the right place and write the missing word in the blank. If you delete a word, cross it out and put a slash (/) in the blank.
Example: 　　
Television is rapidly becoming the literature of our periods. 1. time/times/period
Many of the arguments having used for the study of literature 2. /
as a school subject are valid for ^ study of television 　　　　 3. the

Sporting activities are essentially modified forms of
hunting behavior. Viewing biologically, the modern footballer 71. ________
is revealed as a member of a disguised hunting pack. His
killing weapon has turned into a harmless football and his prey
into a goal-mouth. If his aim is inaccurate and he scores a goal, 72. ________
enjoys the hunter‘s triumph of killing his prey. 73. _________

To understand how this transformation has taken place we
must briefly look up at our ancient ancestors. They spent over a 74.________
million year evolving as co-operative hunters. Their very survival 75.________
depended on success in the hunting-field. Under this pressure
their whole way of life, even if their bodies, became radically 76.________
changed. They became chasers, runners, jumpers, aimers,
throwers and prey-killers. They co-operate as skillful male-group 77.________
attackers.

Then, about ten thousand years ago, when this immensely 78.________
long formative period of hunting for food, they became farmers.
Their improved intelligence, so vital to their old hunting life,
were put to a new use-that of penning ( 把 …… 关在圈中 ), 79.________
controlling and domesticating their prey. The food was there on
the farms, awaiting their needs. The risks and uncertainties of
farming were no longer essential for survival. 80.________