Translation:Soon, you will become a veterinarian at a zoo.
Duo spent a lot of time teaching us "devenir"( become) using the simple near future with "Aller".... "tu vas devenir vétérinaire" and now we have to learn complex future conjugation of "devenir". If you use "aller" devenir never changes (conjugation) because its the second verb. And another thing. Why does "DANS" (in) get translated as "AT" The common use English says IN A ZOO. I work in a zoo. It's not a particularly important, but again could we still be blamed for thinking we can use at instead of in.