Раскройте скобки и выберите глагол в требуемом залоге: активном или пассивном. 1. electronic devices (help; are helped) people discover new phenomena of nature. 2. the transistor (replaced; was replaced) by vacuum tubes thanks to its numerous advantages. 3. due to transistors all circuit functions (carried out; were carried out) inside semiconductors. 4. electronic devices (use; are used) in scientific research. 5. before the invention of the transistor its function (performed; was performed) by vacuum tubes. 6. the reliability of electronic systems (connect; is connected) with the number of discrete components. 7. semiconductor integrated circuits (helped; were helped) to increase reliability of devices. 8. new types of integrated circuits (have developed; have been developed) lately. !
2 was replaced
3 were carried out
4 are used
5 was performed
6 is connected
7 helped
8 have been developed