3. Form the adjectives and the adverbs from the following words:

Adjectives: atom, electron, magnet, cosmos, realist, universe, culture, spectrum, electric, to attract, decision, to conduct, to act, to vary, to change, to approach, to achieve, to suit, to compare, to convert, compress, exhaust, success, doubt, use, wonder, peace, beauty, help, doubt, change, home, meaning; sun, hill, rain, wind, to continue, to vary, danger.

Adverbs: extreme, initial, perfect, final, excellent, rough, instant, swift, equal, simultaneous, comparative, exact, large, hard, high, short.

4. Arrange the following words according to the similar meaning:

Tremendous, predominance, use, various, a real number of, different, advantage, satellite, great, sputnik, application, of late, powerful, recently, a lot of, strong; to detect, decrease, to reduce, to spread, to resist, to propagate, to investigate, to extend, to record, to study, to increase, to catch.

5. Arrange the following words according to opposite meaning:

Inside, low, strong, vast, outside, narrow, high, weak, many, enhance, few, reduce.

6. Answer the following questions:

1. What is the principle of laser operation?

2. What is the principle of the laser based on?

3. Where can laser be used?

4. Why is laser used in space communications?

5. When can an avalanche effect be expected?

6. What does the laser consist of?

7. What is the function of a transparent cylinder in the active medium?

7. Complete the sentences using the comparatives of the words in bolds:

I.

1. You are making too much noise. Can you be a bit…………………………..? (quite)

2. There were a lot of people on the bus. It was ……………………………….(crowded)

3. The hotel was surprisingly cheap. I expected it to be much…………………(expensive)

4. You look …………………………………………………...Have you lost weight? (thin)

5. You are late, I expected you to be here …………………………………………...(early)

II. Complete the sentences using the comparatives of the words in brackets + than:

1. Sorry I’m late. It took me ………..to get here ……………..I expected. (long)

2. Health and happiness are ………………………………… money. (important)

3. I like the countryside. It’s …………………and…………………living in a town. (healthy\peaceful)

4. She looks about 20, but in fact she’s much ……………………she looks. (old)

5. The problem is not complicated. It’s ………………………you think. (simple)

8. Complete the sentences with superlatives and a proper preposition:

I.

1. It’s a very cheap restaurant. It’s ……………………………………………………….the town.

2. It was a very happy day. It was …………………………………………………………my life.

3. She is a very intelligent student. She’s ………………………………………………..the school.

4. It’s a very valuable painting. It ……………………………………………………….the gallery.

II. Complete each sentence using these words: better, worse, further, older, elder. Use than where necessary:

1. We complained about the food in our hotel. But instead of improving, it got …………………………

2. Your work isn’t very good. I’m sure you can do ……………………………………………………this.

3. Ann’s younger sister is still at school. Her……………………………………………sister is a nurse.

4. Is Jim younger than Tom? No, he is……………………………………………………………………

5. You are standing too near the camera. Can you move a bit………………………………………away?