_____by a crowd of people, he felt nervous, ____what to say．

A．Watching; didn’t know                                    B．Having watched ; and not know

C．Having been watched; not know                D．Being watched; not knowing

________ by a crowd of people, he felt nervous, ________ what to say.

[　　]

A．Watching; didn't know

B．Having watched; and not know

C．Having been watched; not known

D．Being watched; not knowing