Two weeks is not enough time to finish this work.
A collective noun can be defined as a type of noun that is typically used as the name of a collection of things or group of people.
Some examples of collective noun include the following:
In English literature, a collective noun generally take singular verb forms. Therefore, the most appropriate word to fill in the gap (blank) is a singular verb "is" rather than "are."
Read more on collective nouns here: https://brainly.com/question/18079927