These interesting articles were written by Anna, who______for our magazine these years.

       A．wrote              B．would write            C．is writing         D．has been writing

These interesting articles were written by Anna, who        for our magazine these years.

       A．wrote              B．would write    

       C．is writing         D．has been writing

These interesting articles were written by Anna, who        for our magazine these years.

A．wrote                                                 B．would write

C．is writing                                            D．has been writing

These interesting articles were written by Anna, who        for our magazine these years.

These interesting articles were written by Anna, who___for our magazine these years.