Chuyển các câu sau sang câu bị động
Chuyển các câu sau sang câu bị động:
1.People should send their complaints to the head office.
2. We must take good care of books borrowed from the library.
3. Must we finish the test before ten?
4. They can open this safe.
5. Someone might steal my shoes.
6. What time can the boys hand in their papers?