TASK DEFINITION: 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.
PROBLEM: My sneakers let off an admittedly adorable perky sound as I marched back over to the sidelines.

SOLUTION: Plural

PROBLEM: Her adrenaline was spiking again, rushing through her veins like an awakened river.

SOLUTION: Singular

PROBLEM: The actions were buttery smooth as he worked them and let them retract into their metal housing.

SOLUTION:
Plural