Question

which sentence is in passive voice? by this time tomorrow, the theater will have been demolished by a wrecking ball. by this time tomorrow, a wrecking ball will have demolished the historic theater downtown.

Explanation:

Passive voice structures place the receiver of the action as the subject, use a form of "be" + past participle, and often include "by" to identify the doer. The first sentence has the theater (action receiver) as subject, uses "will have been demolished" (passive verb form), and names the doer via "by a wrecking ball". The second sentence has the wrecking ball (action doer) as subject, making it active voice.

Answer:

By this time tomorrow, the theater will have been demolished by a wrecking ball.