．— Could you please tell me ______?    

— It’s next to the post office.

A．where is the supermarket

B．where the supermarket is

C．where was the supermarket

D．where the supermarket was

完善监督制约机制，建立健全决策权、（）、监督权既相互制约又相互协调的权力结构和运行机制。

A、参与权

B、知情权

C、选举权

D、执行权