I was also wrong because I had not written some. I suspect as in English, 'Do you want to drink wine' and 'Do you want to drink some wine', are interchangeable but this was not envisaged when the question was written. Could someone confirm or refute please.
some is optional here. If the alternative answer "You want to drink wine." is being rejected, please raise a 'Duolingo bug report', including a screenshot, so that Duo staff can investigate.
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