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When a need is not satisfied, the person is unhappy. An unsatisfied person will do one of two things-look for an object that will satisfy the need or try to reduce the need. People in industrial societies try to find or develop objects that will satisfy their desires. People in poor societies try to reduce their desires to what is available.

2. Light and food industries have been modernized, much being done to expand the production of consumer goods.

3. An experiment demonstrating the existence of an ultraviolet and infrared spectrum must be performed.

II. Определите, к каким частям речи относятся слова одного корня, затем переведите слова.

Technician, technique, technical, technological; change, changeable; create, creater, creative; investigate, investigation; valuable, invaluable; breadth, discovery, define, definite, definition, delive, delivery, reference, refer, reflect, reflector, reflection.

III. Перевести предложения на русский язык, обращая внимание на инфинитивные обороты и инфинитив в различных функциях.

2. As unsuccessful producers go out of business, it is argued that they must cut every corner (облегчить путь) and employ every cost-cutting device in order to sell at the lowest possible price.

3. One of the Savings Bank's most important functions is to mobilize the resources of the population for the development of the natural economy.

4. Our students are provided with all the facilities to study and develop their knowledge.

IV. Перепишите предложения и переведите их на русский язык, подчеркните причастие и определите функции каждого из них.

1. The scientist has made a number of experiments, some of them being very important for our work.

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V. Перепишите предложения и переведите их на русский язык, обращая внимание на условные предложения.

2. If liquids expand upon freezing, an increase of pressure lowers the freezing point.

3. If the metal had been heated slowly, the first changes in its appearance would have occurred at a temperature of 1000°K.

3. It would be impossible to determine the properties of these materials without intensive studies in our research laboratory.

VI. Перепишите предложения, раскройте скобки и употребите соответствующее время.

2. A: I'm looking for Paul, (to see)., him? B: Yes, he was here a moment ago.

3. A: Why to bed so early last night?

B: Because I was feeling very tired.

3. A: Where ...(to go) ?

B: Just to the post box. I want to post these letters. I'll be back in a few minutes.

2. A: .(to watch)., television every evening? B: No, only if there's a good programme on.

3. A: Your house is very beautiful. How long ..(to be)... here?

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