Final answer:
The correct sentence is 'The market was closed' because 'market' is a singular noun and requires the singular verb 'was'.
Step-by-step explanation:
The correct word to fill in the blank in the sentence 'The market ______ closed' would be 'was'. This is because 'market' is singular and hence, it requires a singular verb. The verb 'was' is singular while 'were' is plural. Therefore, the correct sentence is 'The market was closed.'
Learn more about Singular and Plural Verbs