People: People were laughing at the joke.
Policemen: The policemen were helpful.
Classes: I have so many classes today!
Fish: I have an aquarium with fish at home.
Teeth: Don't eat too much candy; you don't want rotten teeth!
Days: I'm counting the days until holiday.
Boys: The boys were misbehaving in class.
Women: There were a lot of women in the choir.
Fruits: I didn't eat all of the fruits!
Flies (nu sunt sigura la acesta) : I didn't manage to kill any flies.