Use Present/Past/Future Perfect or Present /Past/Future Perfect Continuous and write down the following sentences.
Example: By next Friday I (work) on this project for two weeks. By next Friday I will have been working on this project for two weeks.
1. I am sure that he (follow) a thief for two hours already.
2. He was very glad. He (get) necessary documents
3. I am not reading the report because I (read) it twice.
4. No doubt, by the time you call they (come) to the court.
5. When I call the investigator (question) the accused for an hour.
6. They (inspect) the place of murder for half a day when I call to inform the chief investigator.

Saint Petersburg it one of one most beautiful cities of Russia.There is the river Neva in Saint Petersburg.There are white nights in Saint Petersburg.Saint Petersburg is a remarkable city.Saint Petersburg it is a very beautiful city. This city is an important economic, scientific and cultural center of Russia, large transport knot. Река that flows in city it is Neva. Through water objects very much bridges are laid. A city is located on the north-west of Russian Federation. Also in city many parks and entertaining centers.

Red Square is the main square in Moscow. It is the center of the city, and if you look at Moscow's plan, you will see that it is located in the center of the radial layout of the city.

The place for the present Red Square was identified during the reign of Ivan III (the end of XV – beginning of XVI century), when the Kremlin was rebuilt. So, Red Square is allocated along the northeastern wall of the Kremlin.

There is the Lobnoye mesto, the monument to Minin and Pozharsky, Lenin’s mausoleum, the Kremlin Wall Necropolis, GUM, the State Historical Museum, St. Basil's Cathedral, Kazan Cathedral in Red Square.

It is important to note that the area is a pedestrian zone. Vehicular traffic on the cobblestone square was banned in 1974.