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.

Q: The email, as it was open and apparently unfinished, could have easily been a clue as to the whereabouts of General White and his family.

A: Singular
****
Q: The ramp would collapse as I drove away, and the rocks might damage the wheels or undercarriage.

A: Singular
****
Q: Smaller versions of the symbols carved into the walls completely covered the cavern's floor.

A:
Plural
****