69.What would you give me in ____ for my recorder?
My Mp4. Do you agree?

A.reward B.turn C.preparation D.exchange

70.The activity is called “saving the earth”which refers to more reduction of ____ caused to the world by freon of refrigerators.

A.hurt B.harm C.destory D.damage

69.答案是D,

in exchange for 与...交换。

70.答案是D,

cause damage to 对...造成损坏。