"La carretera" should be the answer. It is the only one that makes sense.
Hi!
Answer:
- César es <u>primo</u> de Claudio, Marta y Rebeca.
- César es <u>sobrino</u> de Silvia y de Carlos.
<h3><u>SpanishGirl</u>, Greetings!</h3>
Ex.:
Cantar
Ustedes cantan.
Regular ending is -an.