Определите время предложений 1) the building of the world's longest trans-siberian railway began in 1891. 2) railways are the safest and the most popular means of transportation. 3) he has graduated from our university this year. 4) they will be writing a test at this time tomorrow. 5) the economic and political development of a country depends on a wide network of railways.
past simple
present simple
present perfect
future continuous
present simple