21.  What will happen when we have exhausted all our natural resources?

22.  What would happen if this man were to assume the mantle of the most powerful person on earth?

23.  What would happen to this poor wretch when we let her go?

24.  What would have happened if the man who had been traduced and vilified had been a village schoolmaster?

25.  What would have happened to me if she had died, leaving a baby brother?

26.  When the trailing edge crosses the reverse will happen.

27.  Accidents will happen.

28.  What would happen to your family if you were to die in an accident?

29.  Nothing will happen for a few years yet.