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: Her eyelids flutter and a small smile tilts the corners of her mouth upward.

SOLUTION: Singular

PROBLEM: Several passengers raise their digital cameras and cellphones to snap both Alex and myself.

SOLUTION: Plural

PROBLEM: The front strands of her hair had turned bright white and stood in stark contrast next to the rest of her auburn locks.

SOLUTION:
Plural