47. Turn the following sentences into interrogative and negative:
1. They answered some of the questions.
2. He finished the experiment yesterday.
3. The champion won the match casily.
4. He understood the importance of the problem under discussion
5. He gave an overall picture of the new situation. 6. The children sang like angels.
7. He had some English newspapers.
8. There was somebody at the door.
9. She knew something about it.
10. I bought some oranges.
11. I saw somebody near the garage.
12. I met some English people at the party. ​