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3. It was confident of Hung to present his ideas in front of the committee.
4. It was surprised for us to get the scholarships.
5. It was impolite of her to criticize him in front of his friends.
6. It was brave of Anna to spend the night in the old house alone.
7. It was interesting to hear such a wonderful performance.
8. It was very kind of you to give presents to street children before the new school year.
9. It is necessary to learn English now.
10. It is so important to preserve our living environment.