1. Hello
2. Hi
3. (informal) Hey
4. Hi there
5. (informal) Howdy
6. Bye
7. Bye-bye
8. (informal) See ya later
9. Take care
10. Have a good one
Science Facts
John Haigh killed six people in London, UK, in the 1940s, dissolving their bodies in a bath of acid, hoping he could wash away all the evidence. However, on finding three human gallstones and a pair of dentures belonging to one of his victims in the sludge left behind, the police had enough evidence to convict him.
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