1. The invention of the bicycle made it (lot/easy) for people to travel from one village to another, to meet new people.
a lot easier
2. The world has become a (much/safe) place to live since the invention of antibiotics. People are (far/healthy) now than 100 years ago.
much safer / far healthier
3. The invention of the washing machine has meant that it is (lot/quick) for people to wash their clothes. I think it's (good) invention of the last century.
a lot quicker / the best
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