He has not enough ______ to walk so far. 

Many young people leave their hometown to seek their _______ in big cities. 

Niagara Fall is a great tourist _______ , drawing millions of visitors every year.

The expert’s suggestion is that the villagers in Yunnan Province should have __________ to fresh and clean water as soon as possible.

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