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 red firelight glinted in his auburn hair, and I could see he might have been attractive, even downright handsome, once.

SOLUTION: Singular

PROBLEM: Again more shocked murmurs echoed throughout the room.

SOLUTION: Plural

PROBLEM: " These... items, if you will, contain levels of technology that would take us years to decipher, and that's not all. "

SOLUTION:
Plural