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: As though the numerous pairs acted as one, the blades began to spin and then fly toward him.

SOLUTION: Plural

PROBLEM: A giggle erupted out my mouth and I shifted my eyes from Larissa who was looking up at Marcus expectedly.

SOLUTION: Singular

PROBLEM: There were distant, muffled booms and the occasional pops of gunfire.

SOLUTION:
Plural