heaven knows in a sentence

Examples

1. Why Lacayo should be ashamed to admit it, heaven knows.
2. Heaven knows, TV has had more than enough dim dads.
3. Heaven knows ( the employees ) need plenty of help.
4. Heaven knows these folks are capable of mounting a spectacle.
5. Entertainment, heaven knows, is not what serious art is about.
6. Heaven knows we have far too few as it is.
7. Heaven knows what Newt would say, but who cares?
8. Heaven knows, she checked up on me often enough.
9. If this isnt the mainstream, heaven knows what is.
10. Of course, heaven knows when that day may come.