Decide which three inventions and discoveries from history are the most important. Use the ideas below or think of your own. Give reasons.

1. Fire is one of the great inventions of mankind, because without fire people would not be able to live normally without it.

2. The wheel is one of the great inventions of mankind, because with the help of the wheel we can build a car to move.

3. Soap is one of the greatest inventions of mankind, thanks to soap people can survive for many more years.