you posted this in the Spanish category love.
You would say it the same way you would in English.
Answer:
It depends on how you use it but it will most likely be "el" like if you're saying "I just got a new phone on Monday" it will be "Acabo de recibir un nuevo teléfone el Lunes", in spanish.
Explanation:
Any adjective that ends in an -a would be correct because the adjective needs to be feminine like baja(short), bonita(pretty), alta(tall), ect....
Answer:
José y yo nos quejamos por cualquier cosa
Ellos se fijan en los detalles de las películas
¿Qué vestido me pondré?
Yo no me atrevo a tomar una decisión tan importante
Yo nunca me acuerdo de tu nombre
