______you were busy, I wouldn't have bothered you with my questions.

A．If I realized

B．I realized that

C．Had I realized

D．As I realized

包含重要的国家机密，泄露会使国家的安全与利益遭受到严重损害的文件属于( )。

A．秘密文件

B．绝密文件

C．机密文件

D．保密文件