Iii. подчеркните конструкции с неличной формой глагола. 1. the development of mechanization for the purpose of mail distribution and delivery is agreed to represent a new step towards achieving high quality of service and solving the problem of lack of staff at post-offices. 2. the process of radio communication including transmission and reception of signals, the necessary components of radio are a transmitter and a receiver. 3. the conversion from acoustic to electrical energy is accomplished by varying the resistance of carbon granules held between a cup and diaphragm. 4. the standard telephone allows a customer to perform oral communication, it doesn't yet transmit visual communication.
2. including transmission and reception of signals, the necessary components of radio (причастие)
3. by varying the resistance of carbon granules held between a cup and diaphragm.(герундий)
4. to perform oral communication (инфинитив)