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.

" Ponzi schemes are like investment deals.
Plural

" No apologies are adequate for my leaving you in danger... nor can I ever thank you enough for saving my life. "
Plural

Then a thud and impact and my skull collides into something knocking me unconscious.

Singular