Change the following active sentences into passive without mentioning the doer of the action or the agent.


1. school will open classes in August.
2. You must study today's lesson.
3. They make bags in that factory.
4. Clyde Tombaugh discovered pluto 1930.
5. the police have to search your house again.
6. John committed the mistake again.

Pa answer please badly need it tomorrow. thank you so much everyone ​