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.

The challenge in his voice startled her.
Singular

Again, congratulations passed back and forth until a happy silence fell back on the room.
Plural

His complete lack of interest dented her pride ; still, his attitude shouldn't have come as any surprise.

Singular