In the first sentence, the "he" is a nominative as it is a subject.
In the second sentence it is an object as the form "me" is actually "I", but "i" is a nominative form and "me" is an objective form.
In the third sentence "Us" is also used in objective form as "us" is an object of an action by "my sister".
Creed, credo, dogma, belief, conviction, canon, principle, notion, idea, theory, thesis.
The CORRECT answer would be, "Maria saw an emergency vehicle racing down the street with sirens blaring."
I took the test btw
