Question

which sentence is in passive voice? the twenty - two - hour flight to australia must have utterly exhausted jamal. jamal must have been exhausted by that long flight to australia.

Explanation:

Passive voice places the recipient of the action as the subject, uses a form of "to be" + past participle, and often includes "by" to identify the doer. The first sentence has the flight (the doer) as the subject acting on Jamal, while the second has Jamal (the recipient) as the subject, with the structure "must have been exhausted" (be verb + past participle) and "by" to name the flight as the cause of exhaustion.

Answer:

Jamal must have been exhausted by that long flight to Australia.