In this task you are given a sentence. You must judge whether the object of the main clause is singular(like: apple) or plural(like: apartments). Label the instances as "Singular" or "Plural" based on your judgment.

The sand slid off the strange material as if it was perfectly smooth.
Singular

She fought the urge to look at herself in the strange mirror again.
Singular

But she couldn't shove aside the doubts that they were simply replaying the past.

Plural