The Moscow Metro.
The first line of the Moscow Metro was opened in 1935. Today the Moscow Metro is the 5th busiest metro and the largest metro in the world. A lot of underground stations are landmarks. They look like underground palaces. The Moscow Metro consists of 13 lines with 203 stations (2017). Nearly all of them are underground. During rush hours the minimum interval between trains is 90 seconds. 7 million people travel on the Metro every day. The most popular stations are Pushkinskaya, Kitai- gorod, VDNH, Prospect Mira (Peace Avenue), Lenin State library, Arbatskaya, Botanicheskiy sad (Botanical garden) and much more. To many people, the Moscow Metro represents all that is great and beautiful in Russia.
2) At 5 o’clock yesterday she_was playing_ the piano. (to play)
3) Father _had come_ home by 6, and at 7 he _was having_ dinner. (to come, to have)
4) When I _met_ Tom, he was eating_ an ice-cream which he had bought_ at the corner of the street. (to meet, to eat, to buy)
5) When father_came_ home, we _were cooking_ the mushrooms. (to come, to cook)
6) By 2 o’clock yesterday the teacher _had examined_ all the students. (to examine)
7) On my way to school I __remembered_ that I had left_ my books at home. (to remember, to leave)