Open the brackets using the verbs in the Passive Voice.
1. Information... by radio. (to transmit) 2. A new kind of invisible rays ...
by Rontgen in 1895. (to discover) 3. The efficiency of this device... next year.
(to increase) 4. The engineer... an interesting problem at the research institute,
(to offer) 5. New machinery ... at the plant by the end of the month, (to install)
6. An unusual electric station... into operation now. (to put) 7. The explanation
of this phenomenon... yet. (to give) 8. Yesterday the results of this experiment...
by the presence of some impurities. (to prove) 9. This engineer... as an authority
in optical electronics. (to look upon) 10. The quality of production ... already. (to
increase) 11. Many methods of making and storing electric charges ... during the
18th century. (to discover) 12 We ... just ... the tiniest motor. (to show) 13. The
discovery of the electrons ... by the discovery of the proton and neutron. (to
follow) 14. After the engine... we could use it. (to repair) 15. What plan... when
the professor entered the lecture hall? (to discuss) 16. The performance of the
new computers ... tomorrow. (to demonstrate) 17. At present the sunlight... into
electrical power by special solar panels. (to convert) 18. The robots ... now. (to