Запишите предложения. выпишите из них сказуемые, определите их видо-временные формы и залог. переведите, обращая особое внимание на перевод пассивных конструкций. 1. lectures in up-to-date mining techniques were always attended by a great number of students and young scientists. 2. since the 1880s, coal has been widely used to generate electricity. 3. coal mining has had a lot of developments over the recent years. 4. they will have completed the construction of the new deep- level tunnel by autumn.