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1. Tea can't be made with cold water.

2. The conference will be held before May Day.

3. This room may be used for the classroom.

4. A cartoon film is going to be shown by the teacher.

5. The dam may be broken by a sudden increase in water pressure.

6. Books borrowed from the library must be taken good care of.

7. He can never be found at home for he is always on the movie.

8. The mystery can not be solved.

9. The jewelry must have been stolen while she was out.

10. How can this safe be opened?

Bạn tham khảo bên dưới:
1. You can't make tea with cold water.

⇒ Tea can't be made with cold water.
2. They will hold the conference before May Day.

⇒ The meeting will be held before May Day.
3. You may use this room for the classroom.

⇒ This room may be used for the classroom.

4. The teacher is going to show a cartoon film.

⇒ A cartoon film will be shown by the teacher.
5. A sudden increase in water pressure may break the dam.

⇒ The dam may be broken by a sudden increase in water pressure.
6. We must take good care of books borrowed from the library.

⇒ Books borrowed from the library must be taken good care of.
7. We can never find him at home for he is always on the move.

⇒ He can never be found at home for he is always on the move.
8. Nobody can solve the mystery.

⇒ The mystery can't be solved.
9. Someone must have stolen the jewelry while she was out.

⇒ The jewelry must have been stolen while she was out.
10. How can they open this safe?

⇒ How can this safe be opened?