Choose the option that best completes the sentences.
1. The mercury ____________ was invented in 1714.
2. I guess the _________ is broken. It’s so dark inside the room.
3. Braille, the written language for the blind, was named _______ Louis Braille.
4. The three-wheeled motor car by Carl Benz ________ the beginning of automobiles.
5. The first _______ of the liquid-fueled rocket was on March 16, 1926.
