Определить в каждом предложении глагол-сказуемое и определить его видовременную форму и залог. перевести каждое предложение на язык. 1. astronomers have measured the exact lenght of the day. 2. astronomers find that the day is increased by 0,002 seconds each century. 3. the machines are tested before use. 4. as a rule great discovery is generally followed by numerous others.
2. find- Present Simple, активный залог/ is increased - Present Simple, пассивный залог
3. are tested - Present Simple, пассивный залог
4. is followed - Present Simple, пассивный залог