Question

Which sentence uses the passive voice for the main verb?

If we use our cell phones during class, the teacher confiscates them.
When they can, students slide down the banister in the science wing.
When we can pick our reading, mythology is most often chosen in my class.
If they choose to participate, students perform their poems at the poetry slam

Answer 1

"When we can pick our reading, mythology is most often chosen in my class."

Explanation: "is ... chosen" is passive (form of "to be" + past participle), with the agent omitted.