Part Iv Cloze (10%)

During a trip to observe wild animals in Africa, I encountered the least brave animal on earth the wildebeest(角马).I sat on a riverbank for three hours watching a group of thousands build  56  the courage to drink water.

More than a million wildebeests  57  northward into the wetlands. It is a long, dry and difficult journey.  Frequently.  the only available water is the Grumeti River,  68  represents both life and death. Unlike some creatures that can take moisture  59  the grass they eat, wildebeests must drink from the river to live. The river supports other wildlife, including  60  that kill and eat other animals. Though thirsty  61  traveling, the wildebeests stand back from the water sensing possible danger.

Moving slowly toward the bank can  62  hours, as an individual wildebeest steps forward steps back and then carefully steps forward again, More wildebeests gather together and advance,  gradually pushing the leaders to the river,  63  they want to go or not. It's been a long time  64  they drink last time, and you feel their anxiety for water Lions are possibly on the  65  , saving energy as they wait for an opportunity for lunch Once the large group moves to the river, lions could  66 , making the group running in a wild and uncontrolled  67  The mad rush would raise a dust cloud that blocks the  68  of the wildebeests nearby. a kill is almost guaranteed.

Sitting on that riverbank, I noticed that a young wildebeest finally stepped ahead and drank while the  69  adults held back. Soon, others began drinking. But  70  lining up along the bank, taking turns, they gathered and pushed. Some had to walk farther into the water than they were  71  to go. Those pushed farther in water got frightened and in  72  frightened the others. They all retreated hastily and returned to their route. Only the few that were  73  enough got a drink. The others went  74 . There was no danger that day. only the wildebeests' fear and  75  courage kept them from drinking.