21.  Did I happen to have any nail polish with me?

22.  Did the accident happen at your place of work?

23.  Diverse management would happen in the natural course of things without paying excruciatingly careful attention to balance.

24.  During this slow process, what was happening in the South?

25.  Easy Rider happened to become the film of the moment because it reflected the mood of the moment.

26.  Everything happened as Merlin foretold.

27.  Except that, ironically, it had never happened to him then.

28.  For a moment nothing happened except that the figure of Cesar seemed to grow larger and fill the doorway.

29.  Gee, George, whatever happened to letting the people Decide?

30.  Had that little trick not occurred to him then perhaps their relationship might never have happened.