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 spaghetti straps and the slit in the leg made the dress all the more impressive.

SOLUTION: Plural

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

SOLUTION: Singular

PROBLEM: These ideas refused to completely sink into her mind.

SOLUTION:
Plural