.

_______ in the room where Mr. Johnson lived _______ the exhibition was held?

A．Was it; that

B．It was; where

C．Is it; that

D．It is; where

下列亚洲河流中发源于亚洲中部，流入太平洋，并且孕育了灿烂古文明的是    [ ]

A．长江    

B．湄公河    

C．印度河    

D．勒拿河