Only when _______ be possible to sign the papers.

A．does the lawyer come with it

B．the lawyer comes will it

C．has the lawyer come it will

D．the lawyer comes it will

在操作系统中，文件治理的主要功能是( )

A．实现文件的虚拟存取
B．实现文件的高速存取
C．实现文件的按内容存取
D．实现文件的按名存取