They ____ on the program for almost one week before I joined them, and now we _____ on

it as no good results have come out so far.[ ]

A. had been working; are still working

B. had worked; were still working

C. have been working; have worked

D. have worked; are still working

下列注释中，不正确的是( )。

A．/**注释文字*/

B．/*注释文字*/

C．/*注释文字

D．//注释文字