将下列句子改为被动语态。 1. More and more people speak Chinese in the world. __________________________________________ 2. We can find new buildings everywhere in our city. __________________________________________ 3. They will set up a new school in the small town next year. __________________________________________ 4. We can use the water we use for washing rice again to Water flowers. __________________________________________ 5. Students can't take magazines out of the reading room  without permission. __________________________________________