1. How much farther can geese fly when they fly in a "V" formation?
A.at least 71%
B.at most 51%
C.more than 80%
D.more than doubled
2. When a leader goose gets tired, what will the other geese do?
A.They kill the leader and choose a new leader.
B.The whole flock takes a break and waits until the leader recovers.
C.Some of them bring water and food to the leader.
D.One of them replaces the leader.
3. If we have as much sense as the geese, we will learn to stand ( ) each other
as we are achieving our goals.