阅读下面短文,从短文后所给的A、B、C三个选项中选出能填入相应空白处的最佳选项。
Many of us enjoy watching animals in the world. But do you know they can teach us?
Geese(雁), for example, teach a very good lesson about 1. In the fall, Canada geese fly to the warm south to 2 Canada's cold winter. They lift off in no order. Yet 3 they form a V shape, with one bird leading the group.
This V shape allows geese to 4 energy. When the front bird moves its wings up and down, the resulting force of the air lifts the next one. This continues down the line. The bird 5 has the hardest job. When it gets6 , it moves behind, and another bird moves into the lead. By sharing the role, the group can travel great distances. Geese flying in a V shape can fly 70 per cent farther without 7 than birds flying alone. During the long flying journey, geese communicate with one another. They honk(鸣叫) to 8 the birds up front to keep up the speed. They also cheer each other up 9 working toward a common goal.
What have we learned from the lovely geese's experience and skills?
10 together! Whether it is our personal lives or our jobs, we need other people. We need the spirit of teamwork!