（1）When did Erek Hansen begin to collect old jeans？
A.At the age of 9.
B.At the age of 14.
C.At the age of 19
（2）What kind of pollution could unwanted jeans cause？
A.Air pollution.
B.Water pollution.
C.Land pollution.
（3）Why did BJGG collect old jeans？
A.To send them to poor families
B.To raise money for homeless people
C.To build houses for homeless people.
（4）How many pairs of jeans did Erek Hansen send to BJGG finally？
A.1，468 pairs.
B.1，684 pairs.
C.1，864 pairs.
（5）What is the passage mainly about？
A .Erek Hansen's love for jeans
B.A new program called Denim Drive
C.The story of old jeans and Erek Hansen