(1) I demand to know what's going on.

(2) Policemen know what's going on in their home patch.

(3) I don't know what's going on.

(4) "How come we never know what's going on?" he groused.

(5) Steve's a strange guy - you never know what's going on inside his head.

(6) Riccardo and I are always the last to know what's going on.

(7) Prison officers know what's going on, but look the other way.

(8) I never know what's going on in her mind.

(9) She's so quiet - you never quite know what's going on inside her head.

(10) Half the time the managers don't know what's going on.

(11) You never know what's going on in that sneaky mind of his.

(12) You turn up, you don't know what's going on, there's a lot of nude people and an 8ft transvestite. Only about 10% of people are going to get past that.

(13) You don't really know what's going on in their minds?

(14) I missed the second episode of the series so I don't know what's going on now.

(15) It's very frightening(sentence dictionary), this - the thought that people actually know what's going on in your mind.

(16) There's a lot of activity downstairs - do you know what's going on?

(17) Fire the people who aren't absolutely necessary or who don't know what's going on.