Jawaban:

The passive voice of the given sentence would be: "In some cases, the coronavirus is spread by certain bats."

Penjelasan:

In the active voice sentence, the subject "certain bats" performs the action of spreading the virus, whereas in the passive voice, the subject becomes the receiver of the action. In this case, the focus is on the virus being spread, rather than on the bats doing the spreading. The passive voice is often used when the emphasis is on the action or event rather than the doer of the action.