Name: "The Bolgar Historical and Archaeological Complex". Location: The Volga River to the south of Kazan. Brief description: It contains evidence of the medieval city of Bolgar, an early settlement of the civilization of the Volga-Bolgars, also it was the first capital of the Golden Horde in the 13th century. It is a symbolic reminder of the acceptance of Islam by the Volga-Bolgars, which remains a sacred pilgrimage destination for the Tatar Muslims. Time of existence: from 7th to 15th centuries AD.
1. a
2. b
3. c ?
4. a
5. c
6. a
1. Mouse is a device to move the cursor or pointer on a display screen.
2. Because the connecting wire looks like a mouse tail.
3. Mice usually have two buttons and sometimes as many as three, which have different functions depending on what program is running.
4. The mouse was invented by Douglas Engelbart.
5. In 1963.
6. Stanford Research Center.
7. Mice can be:
1. Mechanical with a rubber or metal ball that can roll in all directions. Mechanical sensors in the mouse detect the direction the ball is rolling and move the screen pointer.
2. Optomechanical with optical sensors to detect motion of the ball.
3. Optical with a laser to detect the mouse’s movement. Optical mice have no mechanical moving parts but they are more expensive.
4. Cordless infrared mice send infrared or radio waves to communicate with the computer.
3
1. There are men on bicycles.
2. These stories are very interesting.
3. These children are my sons.
4.
1. Usually the classes begin at 9 o’clock.
2. John is playing a game of tennis. He has been playing for 2 hours.
3. Now Lena is waiting for Dennis at the museum.
