IN:
Multi-choice problem: [they]

Gladiators are viewed better than Slaves because they fight to the death in the arena.

OUT:
Gladiators

IN:
Multi-choice problem: [he]

The mechanic charged the man one hundred dollars although he had done no work.

OUT:
The mechanic

IN:
Multi-choice problem: [they]

Consultants are hired by companies to perform specialized tasks, but they do not always have money in the budget to hire these services.

OUT:
companies

IN:
Multi-choice problem: [he]

The boy tried to address his friend, but he could not hear.

OUT:
his friend