Question 1 with 1 blank olivia es de argentina. question 2 with 1 blank el profesor es de alemania. question 3 with 1 blank carlos y yo somos de canadá.

¿Olivia es de Argentina?

¿El profesor es de Alemania?

¿Carlos y yo somos de Canadá?

Explanation:

These affirmative sentences are complete and correct. I see you're trying to convert them into questions. The simplest kind of question in Spanish (similar to English) is yes/no questions, and the structure is:

¿ + Subject + verb + complement + ?

In this case, because the sentences are already in the correct order, you just have to add the question marks, remember, in Spanish they go both at the beginning of the sentence and in the end.

probably orange juice since in a restaurant they give you a drink first.

igualmente (likewise) or el gusto es mio (the pleasure is mine)