IN:
Multi-choice problem: [they]

The zookeepers make sure to feed the chimps on a daily schedule so they can remain healthy and content.

OUT:
the chimps


IN:
Multi-choice problem: [he]

John shot Jack, the elephant, in my pajamas, but how he got there is still a mystery.

OUT:
Jack


IN:
Multi-choice problem: [it]

The cabbage was in the freezer and it became full.

OUT:
the freezer


IN:
Multi-choice problem: [it]

The river destroyed the bridge because it was low.

OUT:

the bridge