________ I've got my own car, I don't get as much exercise as I used to.

A．Even if

B．Except that

C．Now that

D．Now and then

物流外包的优点主要是( )。

A．节约包装成本

B．管理更具灵活性

C．可以为企业树立良好的形象

D．便于成本控制