The last sentence is absolutely incorrect, I would say both "There are 1,000,000 people living in the city." and "There are one million people living in the city" are correct.
Rule 1! HAVE FUN!
The Golden Rule: Treat others the way you want to be treated. That is, you shouldn't be rude or offensive, nor should you threaten or physically/verbally abuse anyone.
Follow Rachel's Challenge.
Don't be exclusive, be inclusive, be extrinsic, be extensive, be wild, respectful, and joyful!
Work hard in school.
4. vignettes is the answer!