Определите видовременную форму и залог сказуемого.
а) Действительный залог
1. Industry has developed various applications for the electromagnet.
2. Newton had established his law of gravitation before 1670.
3. The application of electronics is changing the entire life of the people.
4. There were many explanations of the phenomenon of light.
b) Страдательный залог
1. They were given the wrong data of the experiment.
2. The speaker was asked a number of difficult questions.
3. Today polymers are referred to as materials of vital importance.