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1 Read and translate the text
2 Write five questions to every part of the text
3 Make a short summary to the text (9 sentences)

The role of system of SI is defined by a number of its properties which make this system especially convenient:
1. SI is universal and applicable in all areas of physics and technology as has no relation to properties of concrete material.
2. These units can be used with sufficient degree of accuracy.
3. The system of SI is absolute.
4. The system of SI is accepted on the international scale and is introduced in all countries in a legal order.
The international system is universal. It covers all areas of the physical phenomena, all branches of technology and national economy. The international system of units includes wide-spread private systems as metric system of measures and system of practical electric and magnetic units in technology (ampere, volt, weber, etc.). Only the system which adopted these units can claim to be called universal and international.
Units of the International system are rather convenient in most cases by their size, and the most important of them have their own names, convenient in practice.
Creation of the International system answers the modern level of metrology. Here is the balanced choice of the main units, and their numerals and the sizes in particular; coherence (coherence) of derivative units; the rationalized form of the equations of electromagnetism; formation of multiple and submultiple units by means of decimal prefixes.
As a result various physical quantities possess various dimension in the International system, as a rule. It gives an opportunity to carry out the full dimensional analysis, preventing misunderstanding, for example, at control of calculations. Dimension indicators in tselochislenna SI, but not drobna that simplifies expression of derivative units through the main and operating with dimension. The method of decimal prefixes inherited from metric system allows to cover a huge range of physical quantities and provides compliance of SI to decimal system of calculation. SI has sufficient flexibility It admits the use of a number of non-system units.
Judging by the name the international system can and should become the only applied set of units of physical quantities. The problem of unification of units represents the burning necessity long ago. The SI has already made numerous systems of units unnecessary .
The international system of units is recognized by many influential international organizations, including the United Nations taking into consideration questions on education, science and culture (UNESCO). Among the organizations which admitted SI are — the International organization for standardization

(ISO), the International Organization of Legislative Metrology (IOLM), the International Electrotechnical Commission (IEC), the International union of pure and applied physics, etc.
Роль системы СИ определяется рядом ее свойств, которые делают эту систему особенно удобной:
1. СИ универсален и применим во всех областях физики и техники, так как не имеет отношения к свойствам конкретного материала.
2. Эти единицы можно использовать с достаточной степенью точности.
3. Система СИ абсолютна.
4. Система СИ принята в международном масштабе и введена во всех странах в законном порядке.
Международная система универсальна. Он охватывает все области физических явлений, все отрасли техники и народного хозяйства. Международная система единиц включает в себя широко распространенные частные системы, такие как метрическая система мер и система практических электрических и магнитных единиц в технике (ампер, вольт, вебер и т. д.). Только система, принявшая эти единицы, может претендовать на звание универсальной и международной.
Единицы Международной системы в большинстве случаев достаточно удобны по размеру, а наиболее важные из них имеют собственные названия, удобные на практике.
Создание Международной системы отвечает современному уровню метрологии. Здесь сбалансированный выбор основных блоков, в частности их цифр и размеров; согласованность (согласованность) производных единиц; рационализированная форма уравнений электромагнетизма; формирование кратных и дольных единиц с помощью десятичных префиксов.
В результате в Международной системе различные физические величины, как правило, обладают разной размерностью. Это дает возможность проводить полный размерный анализ, предотвращая недоразумения, например, при контроле расчетов. Показатели размерности в СИ целочисленны, а не дробна, что упрощает выражение производных единиц через основные и оперирующие размерностью. Унаследованный от метрической системы метод десятичных префиксов позволяет охватить огромный диапазон физических величин и обеспечивает соответствие СИ десятичной системе исчисления. СИ обладает достаточной гибкостью. Он допускает использование ряда несистемных единиц.
Судя по названию, международная система может и должна стать единственным применяемым набором единиц физических величин. Проблема унификации единиц давно представляет собой насущную необходимость. СИ уже сделала ненужными многочисленные системы единиц.
Международная система единиц признана многими влиятельными международными организациями, в том числе ООН по вопросам образования, науки и культуры (ЮНЕСКО). Среди организаций, допущенных к SI, — Международная организация по стандартизации (ISO), Международная организация законодательной метрологии (IOLM), Международная электротехническая комиссия (IEC), Международный союз чистой и прикладной физики и др.
SUMMARY
The text is about the role of system of SI. It is told that SI is universal and applicable in all areas of physics and technology. However, the system of SI is absolute. The system of SI is accepted on the international scale and is introduced in all countries in a legal order.
Moreover, the international system is universal. It covers all areas of the physical phenomena, all branches of technology and national economy. It should be noted that the international system of units includes wide-spread private systems as metric system of measures and system of practical electric and magnetic units in technology.
After that, we get known that units of the International system are rather convenient in most cases by their size.
In conclusion the author point out that the international system of units is recognized by many influential international organizations, including the United Nations taking into consideration questions on education, science and culture (UNESCO).

QUESTIONS

1. Is the role of system of SI defined by a number of its properties which make this system especially convenient?
2. What is SI?
3. Is the international system universal or universal?
4. Does it cover all areas of the physical phenomena or all branches of technology and national economy?
5. What does creation of the International system answer?

II Grammar Part

1. Заполните пропуски модальными глаголами или их эквивалентами:

1. The teacher could explain the meaning of every word at the last lesson.
2. The students may use a dictionary while translating the text.
3. He had to leave the lesson when he fell ill.
4. Must we do all this work? No, you needn’t.
5. Children can easily make up stories.
6. I shall be able to see my group-mates in the afternoon.
7. You could speak to him at once. Why didn’t you?
8. They will have to learn all the words of Unit 3.
9. Will you be able teach your friend to swim?

2 Поставьте предложения в прошедшем и будущем времени; укажите время и залог глагола:

1. The new metro stations were being built in our city. Past Continuous Passive.
2. Many subjects were studied by the students at our Institute. Past Simple Passive.
3. The letters were received early in the morning. Past Simple Passive.
4. News was reported over the radio every day. Past Simple Passive.
5. The exercises were checked up in class. Past Simple Passive.
6. The children were taken great care of. Past Simple Passive.
7. The delegations were shown around our city. Past Simple Passive.
8. Urgent messages were sent by wire. Past Simple Passive.
9. Oranges were grown in the South. Past Simple Passive.

10. The new metro stations will be being built in our city. Future Continuous Passive.
11. Many subjects will be studied by the students at our Institute. Future Simple Passive.
12. The letters will be received early in the morning. Future Simple Passive.
13. News will be reported over the radio every day. Future Simple Passive.
14. The exercises will be checked up in class. Future Simple Passive.
15. The children will be taken great care of. Future Simple Passive.
16. The delegations will be shown around our city. Future Simple Passive.
17. Urgent messages will be sent by wire. Future Simple Passive.
18. Oranges will be grown in the South. Future Simple Passive.

3 Поставьте глаголы, заключённые в скобки, в соответствующую форму страдательного залога:

1. Our guests are being shown around the city now.
2. Art festivals are held every other year.
3. This scientific problem has been spoken much about lately.
4. The lecture will be delivered in French next time.
5. The method was put in practice a few months ago.
6. A new method is being put in practice now.
7. A lot of beautiful buildings have been built since that time.
8. The article will be written soon.
9. Another excursion was organized for our group last Saturday.

4. Поставьте все типы вопросов к следующим предложениям:

1. What has been sent for?
2. What was learnt by heart?
3. What will be much spoken about?
4. Whose temperature is taken each hour?

5. A taxi has been sent for, hasn’t it?
6. Many poems were learnt by heart, weren’t they?
7. The play will be much spoken about, won’t it?
8. The child’s temperature is taken each hour, isn’t?

9. Has taxi been sent for?
10. Were many poems learnt by heart?
11. Will the play be much spoken about?
12. Is the child’s temperature taken each hour?

13. Has taxi or a car been sent for?
14. Were many poems or plays learnt by heart?
15. Will the play or a car be much spoken about?
16. Is the child’s temperature taken each hour or each minute?

17. What was done with a taxi?
18. How were many poems learnt by heart?
19. How will the play be spoken about?
20. How often is the child’s temperature taken each hour?
21. What is being read aloud?
22. The story is being read aloud, isn’t it?
23. Is the story being read aloud or spoken?
24. How is the story being read?
25. Is the story being read aloud?

5. Ответьте на следующие вопросы:

1. When was America discovered? It was discovered in 1492.
2. By whom was it discovered? It was discovered by Columbus.
3. The new continent was named after Amerigo Vespussi, wasn’t it? Yes, it was.

6. Составьте вопросы к предложениям (по одному на каждое предложение)

1. Electric current is known to flow in metal parts, isn’t it?
2. Who noticed the temperature of the child to be rising?
3. The weather is known to depend on many natural factors, isn’t it?
4. When do we want our reports to be listened?
5. Is the experiment supposed to be completed or to done?
6. Who has never seen him making experiments in the laboratory?
7. The future is expected to bring a great many new scientific discoveries, isn’t it?
7. Раскройте скобки, употребляя глаголы в требующемся времени.

1. I knew they were waiting for me at the metro station and I decided to hurry.

2. I didn’t know that you had already winded up the clock.

3. He says that he knows the laws of the country.

4. He understood that the soldiers had arrested him.

5. He stopped and listened: the clock stroke five.