Read the text and complete it with the right forms of the verbs​

Вот о Торнадо                                                                                                               Tornadoes are most often observed in North America.  So, in April, 1965 over the USA at the same time there were 37 various tornadoes on power, up to 10 km high and in the diameter about 2 km, with a speed of wind up to 300 km/h.  These whirlwinds made enormous destructions in six states. Studying the reasons of emergence of a tornado, scientists use theoretical development, the data obtained in the course of supervision, physical models, but for decades of a tornado continue to annoy people.

The Russian Federation is one of the biggest countries in the world. Russia is situated in Europe and Asia. It is  washed by seas and oceans . There are different types of climate in Russia. It's very cold in the North even in summer. In the South is rather warm even in winter the temperature is above zero.
There are many rivers inRussia. The longest river is Volga. There are a lot of acient and beautiful cities.    St. Petersburg is the most wonderful   city in Russia. It is a real open air museum. 
Moscow is the capital of Russia. It's the biggest city in Russia. There are a lot of sights there. The heart of Moscow is Red square. 
Russia has always played an important role in the world.