The US/UK war against Iraq and the suffering _____ caused have become a big concern all over the world.

. --- Sarah said she wrote you a letter. --- I wonder ______ she is writing to me about.

It's impossible for all the people to get jobs because ____of them are not fit for them.

Building a new school is one thing, while keeping it running smoothly is quite_______.

There must be ______ book which could help .