Translation of caribou in Spanish

I would like to give you a proofreader's project. Proof reading sample sentences that were entered into the dictionary by our users. It is a very tough project and needs a lot of discipline and patience.
I remember once again how I failed as a student, mainly in French class. Since I have lived in Russia, it was not easy to learn other foreign languages. The alphabet is also different.
Why did you sit on the box? You obviously did not know that there were presents inside. Now, seriously, do you have a backup plan? We must buy new gifts if we want to go to the party.?