Example: I drank coffee.
Method: Figure out the noun which cannot be counted and select it.
Answer: The uncountable noun in the above sentence is 'coffee'. Therefore, the answer is 'coffee'.

Example: This is a blue box.
Method: Find the noun, then select the word that is describing the noun.
Answer: The noun in the above sentence is 'box' and the word describing it is 'blue'. Therefore, the answer is 'blue'.

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Example:

Example: |-2| x 3 =