Choose the right option for the gap of "Two- thirds of the work             finished."

The correct option to fill in the gap in "Two-thirds of the work _____ finished." is:

"has been"

Explanation:

• "Two-thirds of the work" is treated as a singular subject because it refers to a single portion (two-thirds) of a singular noun (work).

• Therefore, the singular form "has been" is used instead of the plural "have been".

• The phrase "has been" also correctly forms the present perfect tense, which is appropriate for describing an action that was completed at an unspecified time before now.