情景交际。( 共5小题, 每小题1分, 满分5分 )

Michael: Dad, why don’t we go to school by car?

Dad: Well, I think we ought to walk instead of driving a car.    小题1:  

Michael: You mean we can do something to protect

the environment. Right?

Dad: Yes.  ­小题2:  

Michael: For example?

Dad: Animals are our friends.   小题3:  

Michael: That’s easy. What’s next?

Dad: We can help collect waste batteries（电池）.

Michael:    小题4:  

Dad: Well, waste batteries let out harmful things and pollute the environment.

Michael: Thanks, dad.    小题5:   

根据下表提供的信息回答下列问题。

2007年世界货物进出口贸易前十名之和比1978年增长了( )。

A．8.11倍

B．8.53倍

C．830%

D．839%