______ is surprising to us is that Tom, for ______ English was once boring, can speak English fluently as though he were a native speaker.

A．What; whom

B．What; whose

C．It; whose

D．As; whom

谥号始于周初，为帝王死后，其继嗣者及臣下根据其平生事迹和品行特点所给予的相应称号。( )