The word that can best replace the word "belch" would be force. The word would be force because he was trying to take out the water that he had swallowed.
-Swallow would not be correct because he does not want to swallow the water
-Taste and check are both words that would not make sense
In the future you can replace the words with the options to see which one sounds best and if you don't know what they mean you can always look them up :)