19. Complete the sentences.

1. First-... computers ... 5,000 ... and 1,000 ... . 2. The ...-generation ... performed ... ten times faster than the ... -generation .... 3. Second-generation computers used ... instead of 4. Many companies ... their computers into .... 5. Future computers ... probably ... data with the help of ... of laser light. 6. Some experts predict that… will... a large role in education.

Writing

20. Describe the computer you would like to have in the future.

VOCABULARY

1.	Human being		людська істота
2.	speed		швидкість
3.	calculating machine		лічильна машина
4.	to operate		оперувати
5.	to receive		отримувати
6.	to process		обробляти
7.	speaker		динамік
8.	keyboard		клавіатура
9.	processor		процесор
10.	monitor		монітор
11.	device		пристрій
12.	data		дані
13.	storage		накопичення
14.	hardware		апаратна частина ком’ютера
15.	software		програмне забезпечення
16.	generation		покоління
17.	condition		умова, стан
18.	purpose		мета
19.	in comparison with		у порівнянні з
20.	to link		поєднувати
21.	to improve		покращувати
22.	intelligent machines		розумні машини

Vocabulary Notes

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PART IV

WORLD OF MATERIALS

1. Materials

1. Stand up and walk around the room with your teacher. Ask what things are made of.

Y ou: What’s this made of?

Your teacher: It’s made of glass.

You: What are these made of?

Your teacher: They’re made of leather.

2. What are these materials called?

3. Study this:

4. Make questions and answers:

EXAMPLE: a) A: What’s this setsquare made of?

B: It’s made of plastic.

Study this:

5. Change these sentences:

EXAMPLE: a) This spoon is made of metal.

b) This is a wooden ruler

a) This is a metal spoon.

b) This ruler is made of wood.

c) This is a steel bridge.

d ) This pipe is made of copper.

e) This is a glass bottle.

f) This handle is made of rubber.

g) This is a plastic setsquare.

h) This vice is made of iron.