Open the brackets using the verbs in the passive voice. 1. by radio. (to transmit) 2. a new kind of invisible rays by rontgen in 1895. (to discover) 3. the efficiency of this next year. (to increase) 4. the 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 into operation now. (to put) 7. the explanation of this yet. (to give) 8. yesterday the results of this by the presence of some impurities. (to prove) 9. this 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 we could use it. (to repair) 15. what when the professor entered the lecture hall? (to discuss) 16. the performance of the new computers tomorrow. (to demonstrate) 17. at present the into electrical power by special solar panels. (to convert) 18. the robots now. (to

1. Information is transmitted by radio.
2. A new kind of invisible rays were discovered by Rontgen in 1895.
3. The efficiency of this device will be increased next year.
4. The engineer is offered an interesting problem at the research institute
5. New machinery will have been installed at the plant by the end of the month.
6. An unusual electric station is being put into operation now.
7. The explanation of this phenomenon hasn't been given yet.
8. Yesterday the results of this experiment were proved by the presence of some impurities.
9. This engineer is looked upon as an authority in optical electronics.
10. The quality of production has been already increased.
11. Many methods of making and storing electric charges were discovered during the 18th century.
12 We were just shown the tiniest motor.
13. The discovery of the electrons were followed by the discovery of the proton and neutron.
14. After the engine had been repaired we could use it.
15. What plan was being discussed when the professor entered the lecture hall?
16. The performance of the new computers will be demonstrated tomorrow.
17. At present the sunlight is (being) converted into electrical power by special solar panels.
18. The robots .???.. now. не дописано в условии