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: " If we screw it up, we' l definitely take you up on the offer. "

A: Singular
****
Q: The metal tube slipped and he fell back and rolled into the Irishman's lap.

A: Singular
****
Q: The rearmost seats had been removed, replaced by simple wooden shelves built into the sides of the bus.

A:
Plural
****