Tú casa es grande.

The difference between "tú" and "usted" depends on the formality. "Tú" is used <u>when talking to friends or relatives (informal)</u> while "usted" is used <u>when talking to older people or a person of high social rank (formal)</u>.
In this case we want to write the <u>informal</u> form of "tú", so we use "tú". Also, when dealing with <u>permanent states</u>, the verb "ser" (to be) is used.
El idioma más antiguo es el sumerio y la otra pregunta no se
Answer:
The correct answers are: a, c, and d. (a person who has a family member in bad health that he needs to see, to research medicine an how the advancements in Cuba can help other countries, and to gather information to publish a story about the effect of a socialcomunism has on a society)
Explanation:
Currently, all US cruise trips to Cuba have been banned by the Trump administration, and American vacation trips to Cuba have some restrictions. There are eleven categories of legal trips to Cuba. They include family visits for Cuban-Americans, professional research, journalism, religious activities and athletic competitions.