№148 Put the verbs in brackets into the correct passive form.

1. The scientific study of sound waves … as acoustics (know). 2. Cell phones … in classrooms (ban – запрещать). 3. The Channel Tunnel … in 1994 (open). 4. Many famous buildings in Russia … by the first rector of our University Augustine Betancourt (design). 5 Some new interesting experiments … by the scientists of the department this year (hold). 6. Diesel engine … since 1892, when a German engineer Rudolf Diesel invented a "New Rational Combustion Engine" (use). 7. A lot of new metro stations … nowadays in Moscow to meet public demands (build). 8. Now the question of utilization of different forms of energy … (discuss). 9. In the future trains … with technologies such as magnetic levitation that allow faster and more efficient travel (provide). 10. The conditions of the experiment … carefully … (must control).