Из пассивного залога в активный залог предложения преобразовать.1.Our rooms are cleaned

1. Our rooms are cleaned every morning. We clean our rooms every morning.
2. Our new English textbook will be published next year. They will publish our new English textbook next year.
3. The letters were sent a week ago. We sent the letters a week ago.
4. The first stations of the London Tube were built more than a hundred years ago. They built the first stations of the London Tube more than a hundred years ago.