15. read the text and fill in the gaps transforming capitalized words. the london underground was the st underground one system in the world. it is over 140 years old. its construcconstruct neol in 1860. the system was opened in 1863 and -begin was only 4 miles long (6.5 kilometres) from the run west of london to the city in the east. it was not very deep and steam trains were used. then tunnels deep were built and in 1890 the electric railway was opened. called this system the tube and it is still a very london popular name for the london underground. some of its deep stations were used for of the protect during the world war. a great number city/two of people use the underground system every day be- cause it connects nearly all the parts of this magnificent city. it is not only the _ and the in the old/big world, but it is one of the most modern and efficient sy- stems with its eleven lines which cover london. где пробел надо вставить слова

The London Underground was the first underground railway system in the world. It is over 140 years old. Its construction began in 1860. The system was opened in 1863 and initially was only 4 miles long (6.5 kilometers) from the west of London to the city in the east. It was not very deep and steam trains were used. Then, tunnels were built deeper and in 1890, the electric railway was opened.

They called this system the "Tube" and it is still a very popular name for the London Underground. Some of its deep stations were used for the protection during the World War. A great number of people use the underground system every day because it connects nearly all parts of this magnificent city. It is not only the oldest and the biggest in the old world, but it is one of the most modern and efficient systems with its eleven lines which cover London.

Now let's fill in the gaps with the appropriate words:

1. The London Underground was the first underground _system_ in the world.
2. Its _construction_ began in 1860.
3. The system was opened in 1863 and initially was only 4 miles long (6.5 kilometers) from the west of London to the city in the east.
4. It was not very deep and _steam_ trains were used.
5. Then, tunnels were built deeper and in 1890, the _electric_ railway was opened.
6. They called this system the "_Tube_" and it is still a very popular name for the London Underground.
7. Some of its deep stations were used for _protection_ during the World War.
8. A great number of people use the underground system every day because it connects nearly all parts of this _magnificent_ city.
9. It is not only the _oldest_ and the _biggest_ in the old world, but it is one of the most modern and efficient systems with its eleven lines which cover London.