完形填空

　　1970 was the World Conservation(保护)Year．Everyone must know that the world is in danger．　　1　　 is one example of the 　　2　　．At one time there were 1,300 different kinds of trees and flowers in Holland(荷兰),but now only 866 remain(继续存在),　　3　　 have been destroyed by modern man．We are changing the earth, the air and the water, and 　　4　　 that grows and lives．If we go on like this , we shall destroy ourselves．

　　What will happen in the future? Perhaps 　　5　　　is more important to ask “What must we do now?” The people who will be living in the world tomorrow are 　　6　　 young of today．A lot of them know that conservation is necessary．Many are helping to save 　　7　　．

　　Now fifteen million young people in many countries are studying 　　8　　 and the country around him．In some countries they spend much time as “conservation volunteers．” They plant trees and help to 　　9　　 wild birds and animals．

　　But everyone, 　　10　　 young people, must work to save our world．

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)