18．
Science has discovered that as each bird flaps （拍打） its wings，it makes uplift for the bird behind it．By flying in a"V"formation，the whole group adds at least 71percent greater flying range （范围） than if each bird flew on its own．In autumn，geese head south for the winter，flying in a"V"formation （队形）．
People who share a common direction and sense of community can get where they are going more quickly and easily，because they are traveling with the help of one another．
When a goose falls out of formation，it won't try to go it alone but will quickly get back into formation．
If we have the sense of a goose，we can stay in formation with people who are heading in the same direction as we are．
When the head goose gets tired，it goes back in the wing and another goose flies to the point．
It is sensible to take turns to lead，whether with people or with geese flying south．
Finally，when a goose gets sick or is wounded （受伤） by a gunshot，two other geese fall down with that goose．They follow it down for protection and to lend help．They stay with the fallen goose until it is able to fly or until it dies．
If we have the sense of a goose，we can stand by each other like that．
86．How can people get where they are going more quickly and easily？D
A．They can travel with the help of cars or planes and so on．
B．They can try to do it alone．
C．They can share different direction．
D．They can share a common direction and sense of community．
87．If a goose falls out of formation，what will it do？B
A．It will try to go alone．
B．It will quickly get back into formation．
C．It will ask others for help．
D．It will find another formation．
88．The word"sensible"in the six paragraph probably meansDin Chinese．
A．明显的
B．意识到的
C．通情达理的
D．明智的
89．Which of the following is TRUE according to the passage．D
A．The whole group adds at most 71% greater flying range than if each bird flew on its own．
B．In winter，geese head south．
C．We can't stay in formation with people who are heading in the same direction as we are．
D．When a goose gets sick，two other geese fall down with that goose．
90．From the passage we know thatA
A Teamwork is important．
B．People should be brave．
C．Nothing seek，nothing find．
D．Failure is the mother of success．
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