Minuto is the answer to your question
Are the sentences supposed to be in past or present or future tense ?
A: Me llamo
B: Un placer
C: Soy de
D: De dónde
E: Tú
F: Hasta mañana
Answer:
you can use it when you need to say things like
Un: Un gato - a cat
unos: unos gatos- some/male cats
unas: unas gatos- some female cata
una: una gato- a female cat