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 senator was a skeptic, always has been.

A: Singular
****
Q: The marine layer was far off the coast, giving the sun the opportunity to shine and the temperature to reach the high seventies.

A: Singular
****
Q: The planes are already overhead, and I feel sick in a way I don't know how to explain.

A:
Plural
****