People first tamed animals a very long time ago. It was a necessity - they needed to have meat, milk, fur at hand. It was easier to have animals near than to go hunting in dangerous conditions. Then people tamed the next group of animals - to protect the useful animals from the wild. And suddenly humans realized that it was fun to have a home animal. Thus first pets took their place in the homes of our ancestors. Nowadays people can choose a wide range of different pets - cats, dogs, mice, hamsters, snakes, lizards, birds. The most popular are cats and dogs. But I think it is easier to have a caged pet. For example, chinchillas. Because modern people spend most of the time at work, in my opinion it is cruel towards dogs or cats who might feel lonely. But if I speak of myself I would choose a dog, because it is a loyal and kind creation and I like long walks where my dog would be a companion.
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.
ничего я не понял
слишком долго делать