9. Replace the infinitives in brackets by the Present Indefinite, Present Continuous, Present Perfect or Present Perfect Continuous Tense:

1. Where are the pupils? – They (to plant) trees. They (to plant) them since the morning. They always (to plant) trees in October. They already (to plant) several hundred trees this year.

2. Ann (to have) her music lesson now. She (to have) her music lessons twice a week.

3. I am going to take a walk. I (to do) all my home exercises already. I (to do) them for three hours.

4. Since when they (to build) this house?

5. At last I (to find) the book I need. I (to look) for it for a quarter of an hour.

6. Don’t shout. Helen (to read) an English book. She (to work) at her English every day. She (to learn) this language for three years. She (to read) many English stories this year.

7. What you (to do) in the morning? What you (to do) since the morning?

Lesson 5

Peripherals

Peripheral equipment (also called: input and output devices) is any equipment used to give a computer system more features. Input is anything that goes in; and output is any thing that goes out. Any device for the computer that the computer can work without is peripheral equipment. This equipment is always separated from the central processing unit (CPU) by a device controller.

Peripheral equipment is necessary for people to interact with a computer system. Some peripheral equipment displays information (such as a computer monitor).

Peripheral equipment is often labeled I/O device (Input/Output device). I/O devices are connected to a device controller which is connected to the electronics in the computer system. An example of an output device is computer speakers. Computer speakers are plugged in to a device controller called an audio device. The device is connected to the rest of the system inside. An example of an input device is a computer mouse and it is connected in a same way as an output device.

One peripheral device can be connected to many systems.

Sometimes extra memory devices such as a second hard disk can be called peripheral equipment. People who make computer programs call everything except the processor and main memory an I/O device. To an engineer working on the design of a processor, everything except the processor is called an I/O device.

1. Translate the following terms and terminological expressions:

Peripheral equipment, input device, output device, device controller, interact with a computer system, to displays information, to be plugged in, extra memory devices.

2. Find the English equivalents in the text:

Бути відокремленим від…, бути маркованим (мати маркування), бути з’єднаним, називатися, решта системи, таким же чином (способом), за винятком процесора.

3. Answer the following questions:

1) What is peripheral equipment?

2) How does it called?

3) What is the equipment separated from the central processing unit by?

4) How is peripheral equipment labeled?

5) What are computer speakers plugged in to?

6) Can one peripheral device be connected to many systems?

7) How does an engineer call everything except the processor?