Goal and options: How can you prevent yourself from losing your keys?
output answer: Place a safety pin through the keys and pierce the cloth in your pocket as you are away from home, the keys will be held safely.

Goal and options: sponge
output answer: is soaked by watering can

Goal and options: To clean old CDs that are scratched and dirty so that they continue to work,
output answer:
rub the CDs with toothpaste, a clean rag and cold water afterwards.