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 marine layer was far off the coast, giving the sun the opportunity to shine and the temperature to reach the high seventies.

SOLUTION: Singular

PROBLEM: Jackson's nostrils flared and I expected him to defend his actions, but he changed his tactic.

SOLUTION: Plural

PROBLEM: You may now drive at the speed limit, " the colonel said to him as the cop watched them pass.

SOLUTION:
Singular