Question

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.

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Answer 1

1 help 
2 was replaced
3 were carried out
4 are used
5 was performed 
6 is connected
7 helped
8 have been developed