将以下句子改成被动语态。
1. She often waters the flowers every morning.
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2. He invites me to the party.
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3. The teacher blamed him for his being late yesterday.
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4. I saw them swimming in the sea.
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5. We will send him there tomorrow.
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6. The rabbits will eat the carrots.
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7. They will finish this project in five years.
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8. They are going to encourage children to take more exercise.
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9. The students are going to clean the classroom after school.
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10. The people of Beijing will plant more trees and build new roads.
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