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: The squad of Canadian rangers continues to hack its way through the thick brush.

SOLUTION: Singular

PROBLEM: Almost as if held in a trance the passengers remained in a hushed silence for a few more seconds.

SOLUTION: Plural

PROBLEM: A TV tax had been common in the countries of the British Commonwealth since TV's inception.

SOLUTION:
Singular