"Where should the beverages go?"
Translation:Wohin sollen die Getränke?
I'd like to know this too.
I think there's a possibility that "gehen" means something more active, especially given that it's used to mean "to walk", so your sentence (which I also typed and got wrong!) would mean something more like "where should the beverages move themselves to?" and not "where should I put them?" But I'm not a fluent German speaker, so I'm guessing at this point.
"To where shall the drinks?"
So, what is missing in the sentence, when can you do that, how to tell when something is missing or WHAT is missing?
This is a bit colloquial, but sollen and müssen together with a local indication or direction means 'having to go there'. For example in an elevator someone could ask:
"Wohin musst du?" (Where are you heading?)
- "Ich muss in den fünften Stock." (I have to go to the fifth floor.)
Or for this example:
"Wohin sollen die Getränke?" (Where should the beverages go?)
- "Die Getränke sollen in den Kühlschrank." (The beverages should go to the refrigerator.)
You can complete the sentence with ".... gebracht werden?", if you like, but it's very common to just use the modal verb sollen for the English "should go", even though it's a bit colloquial.
There are also common phrases like "Wo muss/soll ich hin?", "Ich muss da hin!" that obviously miss a full verb. It's always an omitted "gehen". Often it would sound strange then to actually add the verb, like in our example ("Wohin sollen die Getränke gehen?")
Idioms, colloquialisms and "common to just use" should not be in substantive modules.
Wohin sollen die Getränke gehen? Is for me completely natural. Why Duo does not accept it?
It is grammatical and understandable, but according to me a less common way to put it. By omitting the full verb you avoid to specify the actual type of motion, which is quite elegant, as "gehen" tends to be understood as "to walk" in German, more than "to go" in English. As I said it's not wrong, maybe they just want us to notice the habit of omitting the full verb in this type of sentence (modal verb + destination).