The correct pronoun to use in that sentence is "themselves."
The complete sentence would be: "While I was busy setting up, the students occupied themselves, revising their drafts."
While I was busy setting up, the students occupied _____, revising their drafts.
the students occupied them, revising...
they occupied each other, ….
they occupied themselves, revising....
1 answer
The correct pronoun to use in that sentence is "themselves."
The complete sentence would be: "While I was busy setting up, the students occupied themselves, revising their drafts."