Open the window and let in some fresh air.（英译中)

Prolonged high unemployment will threaten the current leadership in other capitals as well, and it could ignite violent upheavals in some of the most hard－pressed land.（英译中)

The reason why we have to grow trees is that they can supply fresh air for us.（英译中)

In the first place, some aspects of the traditional technology and methods are harmful and hampering the development of modern science and technology.（英译中)

Fresh air and exercise are good for the health.（英译中)

You can buy fresh vegetables in the market.（英译中)

—May I open the window to let in some fresh air ？—___________A. Come on B. Take care C.