21．―Karen, can I talk to you for a minute?
―Sure, ________?
A．how come B．what’s up C．how’s that D．what for
22．The chairman will be pleased at ________ scene that everything is in ________ place．
A．a; a B．the; the C．the; 不填 D．不填; the
23．Cao Cao’s tomb is reported ________ in China, which attracts nationwide attention．
A．being found B．to be found
C．having been found D．to have been found
