3. You'd better take warm clothes because it's cold.
4. It rained heavily yesterday so they didn't go camping.
5. My town is visited by hundreds of tourists every year.
6. A lot of rubbish was collected on the street yesterday.
7. No one in Mai's class is more intelligent than her.
8. I think changing these sentences into passive voice is difficult.
9. Old photographs are contained by my grandfather in those boxes.
10. We were told an interesting story by our grandmother last night.