Answer:
1.) None of the teachers stay at school past 5:30 P.M.
Simple Subject: teachers
2.) Either of the schools wins the pennant every year.
Simple Subject: schools
3.) The boy has many types of snakes in his back yard.
Simple Subject: boy
4.) Each of the men is going to compete in the race.
Simple Subject: men
5.) Cake and coffee make an excellent ending to a meal.
Simple Subject: cake and coffee
6.) Every one of the girls needs to be at practice today.
Simple Subject: girls
Explanation:
The simple subject is the main word that is in the subject of a sentence. It is very basic and is the primary performer of the action in that sentence.