--The room is so dirty. ________ we clean it? 

--Of course.

[　　]

—The room is so dirty. ________ we clean it?

—Of course.

[　　]

—The room is so dirty. ________ we clean it?

—Of course.

[　　]

—The room is so dirty. ________ we clean it?

—Of course.

[　　]

--The room is so dirty. _____ we clean it?

--Of course.

[　　]

A．Will　　　　　　B．Shall

C．Would　　　　　D．Do