Unit II. Computer systems lesson Theme: Living with computers

Listen again and complete these extracts
1.This device is____________________enter information into computer
2. … it may also___________________function keys and editing keys_______________special
purposes.
3.This is a device __________________ the cursor and selecting items on screen.
4. It usually___________________two buttons and a wheel.
5. … the user_________________activate icons or select items and text.
6. It____________ detecting light from the computer screen and is used by pointing it directly at
the screen display
7. It____________the user_______________answer multiple-choice questions and __________.

II . HOMETASK

APPENDIX 7: EXERCISE
Task 1: Label the groups of keys with terms from extract Keyboard. Then identify the keys described below.

1. It produces upper-case letters, but it does not affect numbers and symbols.

2. It removes the character to the left of the cursor any selected text.
3. It works in combination with other keys, e.g. you press this key and C to copy the selected text.
4. It is used to confirm commands; in a word processor, it creates a new paragraph.

Appendix 5. Reading

Task 1. Look at the text of the lesson: extract Mouse. Complete these sentences with processor, it creates a new paragraph.
1. To start a program or open a document you…………..on its icon – that is, you rapidly press and release the mouse button twice.
2. If you want to select a menu option, you just………….on the left button.
3. If you want to find the commands for a particular text, image, etc., you have to……………on it.
4. If you want to move an object, press the button and………………the object to the desired location.

Task 2. Look at the text of the lesson: extract Voice input. Complete each sentences by choosing from the following devices: touch screen, trackball, touchpad, webcam.

1. 
   A……………..is a stationary device that works like a mouse turned upside down. You roll the ball with your hand to move the pointer on the screen.
   
2. 
   Interactive…………….are used in museums, information centres and Internet kiosks. You use your finger to point directly to objects on the screen.
   
3. 
   A…………..is used to send live video images via the Internet.
   
4. 
   A…………..is found on notebook PCs. You use it by pressing the sensitive pad with a finger.