12. составьте предложения из предложенных в каждой цепочке слов. 1) first, in, 1829, george stephenson, the, world’s, steam, locomotive, constructed. 2) harmful, trains, are, by, diesel-powered, produced, substances. 3) over, the, have, national, years, different, networks, developed, been, rail. 4) is, railways, the, 21st century, of, transport, age, the. 5) being, electric, traction, used, eco-friendly, is, now, widely.