Question

which sentence is in passive voice? an 1862 mexican military victory is commemorated by cinco de mayo. the holiday of cinco de mayo commemorates an 1862 mexican military victory.

Explanation:

Passive voice structures follow the pattern "receiving subject + 'be' verb + past participle + 'by' + doer". The first sentence uses active voice (subject "The holiday of Cinco de Mayo" performs the action "commemorates"). The second sentence has the action's receiver ("An 1862 Mexican military victory") as the subject, uses "is commemorated" (be verb + past participle), and includes "by" to identify the doer ("Cinco de Mayo"), fitting passive voice rules.

Answer:

An 1862 Mexican military victory is commemorated by Cinco de Mayo.