Use the verbs in the required tense form in the active voice. 1. every year, computer engineers [to make – present indefinite] chips that can hold more bytes. 2. a warning message [to flash up– past indefinite] on my computer screen. 3. prospector [to be – present indefinite] a computer expert system that [to help– present indefinite] geologists in their search for new mineral deposits. 4. the discovery of semiconductor materials [to play – past indefinite] a very important role in the development of electronics. 5. cd-rom usually [to contain – present indefinite] up to 680 megabytes of computer programs and data. 6. installation of the security system [to take – future indefinite] several days. 7. the new computer virus quickly [to spread– past indefinite] worldwide. 8. this shop [to sell– present indefinite] printers and scanners, and all-in-ones that [to combine – present indefinite] two devices. 9. i [to find– past indefinite] this information on the internet. 10. the password [to give – future indefinite] you access to all files on the hard disk.

Aidanok1    1   22.09.2019 14:20    2