To complete the sentence correctly, you should use "much" or "many" depending on the noun you are referring to. In this case, since "cheese" is a countable noun, we should use "much" with uncountable nouns.
Therefore, the correct completion of the sentence would be:
"We don't need much cheese."
Here's a brief explanation:
- "Many" is used with countable nouns (nouns that can be counted or have a plural form), e.g., "many apples."
- "Much" is used with uncountable nouns (nouns that cannot be counted or do not have a plural form), e.g., "much water."
In this sentence, since "cheese" is uncountable (we cannot say "cheeses"), we should use "much."