Explanation: "Casa" ends in -a, so it's feminine. The feminine definite article is "la".
Explanation: "A + el" contracts to "al". "Voy al cine" = I go to the cinema.
Explanation: "Libro" ends in -o, so it's masculine. The masculine indefinite article is "un".
Explanation: "De + el" contracts to "del". It shows possession or relationship.
Explanation: "Libro" ends in -o, so it's masculine. The plural masculine article is "los".
Explanation: "Doctora" is feminine. Use the indefinite article "una" before professions.
Explanation: "Mano" is an exception — it's feminine even though it ends in -o. Gender must be memorized with the noun!
Explanation: "Sillas" is feminine plural. Use "unas" (some) before plural feminine nouns.