In this task you are given a sentence. You must judge whether subject of the main clause is singular or plural. Label the instances as "Singular" or "Plural" based on your judgment.

Q: A mass of recruits had already gravitated to the Whites.

A: Singular
****
Q: A flat screen television fitted snugly into the upper left corner wall.

A: Singular
****
Q: The slowly circling fan in her room did little more than push the already hot air around.

A:
Singular
****