

Pongo los libros en una caja.
[ˈpoŋɡo loz ˈliβɾos en ˈuna ˈkaxa.]
I put the books in a box.
¿Qué hay en la caja?
[¿ˈke ˈaj en la ˈkaxa?]
What's in the box?
Esta caja es muy grande.
[ˈesta ˈkaxa es muj ˈɣɾande.]
This box is very big.
"la caja" is in the lesson "Office" (Level 34), along with 15 other useful words. LinDuo has 180 topic lessons like this one, 2,369 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.