Select the option that expresses the given sentence in passive voice.

It is time to revise the syllabi.

It is time for the syllabi to be revised.

The correct passive voice form of the given sentence "It is time to revise the syllabi" is It is time for the syllabi to be revised.

The active voice of the sentence is "It is time to revise the syllabi." This sentence is in the present tense, which is used to describe an action that is happening now. The passive voice of the sentence is formed by putting the subject of the active sentence after the verb "to be" and the past participle of the main verb. In this case, the subject of the active sentence is "syllabi" and the main verb is "revise." The past participle of "revise" is "revised." So, the passive form of the sentence is "It is time for the syllabi to be revised."

The other options are incorrect because:

• It is time for the syllabi to revise. This sentence is in the active voice, not the passive voice.
• It has been time for the syllabi to revise. This sentence is in the present perfect tense, which is used to describe an action that happened in the past and is still relevant to the present.
• It was time for the syllabi to be revised. This sentence is in the past tense, but the action of the syllabi being revised is still relevant to the present.