Did you know that Rome was a very mountainous area, and it was built right by the Tiber River.
the myth of Romulus and Remus
I did, but did you know that some Romans believe two twins built Rome after beating their uncle in a invasion.
the Etruscan influence of engineering on the Romans
Also the Romans got Archways and cuniculus from the Etruscans. The Romans used the cuniculus to irrigate towns and their farm land.
the Etruscan influence of sports on the Romans.
well didn't the Romans get gladiators and chariot races from the Etruscans. Also the fights are to the death and races could lead to death.
the Greek influence of architecture on the Roman civilization.
That is correct, but the Romans learned some of their architecture from the Greeks mainly columns, but they used the columns to eventually learned how to make concrete to go even higher.
the Greek influence of writing, art, or religion on the Romans.
Before I go lets see if I can one up you. The Etruscan's took the Greek alphabet to late change it, then the Romans took it from the Etruscan's and changed it again. Roman art came from Greek art or indirectly found from the Etruscan, Then the Romans made their own style of creating the pottery. Also Romans got most of their gods from the Greeks And gave them Roman names and preformed the right ritual at the right time for an occasion.