Change the following sentences into passive.
1. The teacher will give her a prize if she works well.
- She will_____.
2. You must finish those letters by 5 o’clock.
- ________.
3. Nobody has used this room for months.
- This room______.
4. Did they build that house in 1972?
- Was_______
5. They didn’t allow Jim to take these books home.
- Jim_______.
6. No one can solve this problem.
- This________.
7. They couldn’t sell this house at this price.
- This house_______.