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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参考答案：

1. The flowers are often watered every morning.
2. I am invited to the party.
3. He was blamed for his being late yesterday/
4. They were seen swimming in the sea.
5. He will be sent there tomorrow.
6. The carrots will be eaten by the rabbits.
7. This project will be finished in five years.
8. Children are going to be encouraged to take more exercise.
9. The classroom is going to be cleaned after school.
10. More trees will be planted and new roads will be built by the people of Beijing.