Определите форму глагола – сказуемого (залог, время).
Some blind and partially sighted people use computer-based technology to gain access to printed information. 2. In 1997, a new technology emerged that brought digital sound and video into homes over the world. 3. Since 2006 another revolution with the introduction of Blu-ray Discs has taken place. 4. Users will be able to connect to the Internet via Wi-Fi. 5. Minicomputers are becoming less popular as microcomputers improve. 6. We have been solving the problem since 1993. 7. Up to this point we have been discussing information retrieval in general terms. 8. Two keys are usually employed, one to encode and the other to decode the information. 9. The separate elements of the building have been manufactured at different factories. 10. Computer Security techniques are being developed to protect single computers from accidental or intentional invasion of data by unauthorized individuals. 11. Science is the means by which the hole of our civilization is rapidly being transformed. 12. The new device will have been tested before the chief engineer comes.
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Ответы и объяснения

use (Present Simple, активный залог)
2. emerged (Past Simple, активный залог)
3.  has taken
(Present Perfect, активный залог) 
4. will be able
(Future Simple, активный залог)
5. are becoming
(Present Continuous, активный залог)
6. have been solving
(Present Perfect Continuous, активный залог)
7. have been discussing
(Present Perfect Continuous, активный залог)
8.  are employed
(Present Simple, пассивный залог) 
9. have been manufactured
(Present Perfect, пассивный залог)
10. are being developed
(Present Continuous, пассивный залог)
11.  is being transformed
(Present Continuous, пассивный залог).
will have been tested (Future Perfect, пассивный залог)