—The meeting is about to start, yet the speaker hasn’t turned up.

— No one knows ____.

A．what the matter is

B．what is the wrong

C．what is the matter

D．how matter stood

检验检疫人员( )对外交豁名权人员携带的检疫物进行查验。

A．有权

B．无权

C．按照规定

D．按照上级指示