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

Teachers should cover all the topics in the syllabus.

All the topics in the syllabus should be covered by teachers.

The correct option that expresses the given sentence in the passive voice is All the topics in the syllabus should be covered by teachers.

The other options are incorrect because:

• Teachers should cover all the topics in the syllabus is in the active voice.
• Teachers should be covered the syllabus in all the topics is grammatically incorrect. The verb "covered" is in the past participle form, but it is not used correctly in the passive voice.
• Teachers should be covered all the topics in the syllabus is grammatically incorrect. The verb "covered" is in the past participle form, but it is not used correctly in the passive voice.
• All the topics in the syllabus should cover teachers is grammatically incorrect. The subject of the sentence is "all the topics in the syllabus," but the verb "cover" is in the active voice, which means that the subject is doing the action.