We are short of clean safe drinking water, which is found to be the ______ in many third world countries.

The fans were well behaved,and the game was played without _________.

AIDS is spreading all over the world at shocking speed. Where its dark _______ appears, we see pain, tears and death.

 After years of war, the people in that country were eager to live in_________.

Measures _____to stop housing prices from rising too fast, but it remains to be seen whether they still work.