Подчеркните participle i и participle ii и установите функции каждых, т.е. укажите, является ли оно определением, обстоятельством или частью глагола-сказуемого. 1. matter consists of one or a number of basic elements occurring in nature. 2. unless properly treated the metal can not be used for space technology. 3. while working at a new transmitter for deaf people bell invented a telephone. 4. the air in many cities has been polluted by traffic and industry.

1. Matter consists of one or a number of basic elements occurring (определение) in nature.
2. Unless properly treated (обстоятельство) the metal can not be used (часть глагола-сказуемого) for space technology.
3. While working (обстоятельство) at a new transmitter for deaf people Bell invented a telephone. 
4. The air in many cities has been polluted (часть глагола-сказуемого) by traffic and industry.