Ответ:

Ex. 71

Объяснение:

1. Many millions of people speak Russian.

2. My dad opened the window.

3. We clean our rooms every morning.

4. They will publish our new English textbook next year.

5. They sent the letter a week ago.

6. They built the first stations of the London Tube more than a hundred years ago.

7. They teach English and German in lots of schools.

8. Whom will they ask at Maths lesson today?

9. We buy bread and milk in our local shop every Friday.

10. They showed the film last year.

11. We bought vegetables at the market on Sunday morning.

12. We hope that in the XXI century they will study Russian in lots of countries.