What’s the matter with the radio? Why isn’t it _____?
The library needs __, but it will have to wait until Sunday.
A left-luggage office is a place where bags _______ be left for a short time, especially at a railway station.
Sir, you ______be sitting in this waiting room. It is for women and children only.
Jack _____ yet, otherwise he would have telephoned me.
I told Sally how to get here, but perhaps I ____ for her.