It’s the fact ________ he doesn’t know his own birthday _______ surprises us all.

A. which, which                         B. which, that 

C. that, that                           D. that, which

 It’s the fact ________ he doesn’t know his own birthday _______ surprises us all.

A. which, which                         B. which, that 

C. that, that                           D. that, which

.

It’s the fact ________ he doesn’t know his own birthday _______ surprises us all.

A. which, which                                    B. which, that 

C. that, that                                        D. that, which

It's the fact _____ he doesn't know his own birthday       surprises us all．

It's the fact _____ he doesn't know his own birthday       surprises us all．

       A．which, which                        B．which, that

       C．that, that           D．that, which