Question

look at the text below. if there is an error with subject - verb agreement, select the incorrect verb and type it correctly. otherwise, submit the text without making any changes.
the hollandaise sauce was perfect - creamy with just the right amount
of lemon tang. i went back to the kitchen for more to put on my eggs benedict,
but none was left.

Explanation:

The text is checked for subject - verb agreement. The subject "none" here refers to the uncountable "hollandaise sauce" (since we are talking about the amount of sauce left). When "none" refers to an uncountable noun, the verb should be singular. In the sentence "but none was left", the verb "was" is correct as it agrees with the uncountable subject (the sauce). So there is no error in subject - verb agreement.

Answer:

The hollandaise sauce was perfect - creamy with just the right amount
of lemon tang. I went back to the kitchen for more to put on my eggs Benedict,
but none was left.