— What are you going to do this afternoon?

— I am going to the cinema with some friends. The film _____ quite early, so we _____ to the bookshop

     after that. [ ]

A. finished; are going

B. finished; go

C. finishes; are going

D. finishes; go

（）是火电厂中的主要设备，亦称三大主机。与三大主机相辅工作的设备成为（）或称（）。主机与辅机及其相连的管道、线路等称为系统。火电厂的主要系统有燃烧系统、汽水系统、电气系统等。

A、机、炉、电

B、辅助设备

C、辅机

D、主机