Nuclear science should be developed to benefit the people _____ harm them.

The H1N1 flu spread very quickly at the beginning, __________, many people were ill.

Attention, coffee lovers! We have for you, the best coffee machine _____ invented.

—Thank god, you finally returned home ________. —You can never imagine how I worried about you when I was told about the terrible accident. 

Several musicians say they consider it the greatest musical composition ____written.