My father is from Spain and we have visited our family there many times. Your Spanish teacher is incorrect or possibly referring to a part of Spain other than Madrid. "Zumo de naranja" is how it is referred to.
Just in case you're wondering why, it's because oranges are a cross bred fruit that was first developed in China. So it's kind of like Canadian Bacon or French Fries. Though I guess the fries were introduced to US by French speaking Belgians :-)
For everyone saying zumo is correct spanish, it is only used in spain. A majority of spanish teachers do not use that because they do not teach "spain" spanish. Jugo is used for juice pretty much everywhere else.
Ive wasted 1/2 an hour trying to get past this problem ?? Why, i don't understand how you can ignore this, i have posted comments and nothing.??
Duolingo is a great app until this happens again then it confuses me.
I love how a lot of people from spain are critiquing this when they're not the only spanish speakers in the world, that's like comparing an American's english to a Canadian's english, or a person from the UK's english. Just stop