3. Перепишите следующие предложения, определите в них функ­цию инфинитива и письменно переведите предложения на русский язык.

1. You are a bachelor with no family to take care of.

2. To tell her the truth now is not at all necessary.

3. What I wanted was not to be misunderstood.

4. Заполните пропуски необходимыми артиклями.

1. When I was ... young boy, I wanted to play ... trumpet, but I wasn't very good at it. So I decided on architecture. When I told my father that I wanted to be ... architect, he said, "Are you crazy? ... builder is much more important." He was ... builder and for him, ... son of ... builder should be ... builder.

2. …Moscow is in … Europe. It is … nice city.

3. In … north-west and west the country is washed by … Atlantic Ocean and … Irish sea.

4. Why is ... earth hottest at the equator? – Because it is the part of ... earth that is closest to ... sun.

5. … heartache is deep sorrow and emotional suffering.

5. Перепишите следующие предложения, определите в них видовременные формы и залог глаголов-сказуемых и укажите их инфинитив; переведите предложения на русский язык.

1. Vitamin A is an unsaturated cyclic alcohol.

2. Ultra-violet light has a harmful influence on a rubber surface.

3. Digitalis was administered to the patient to increase cardiac tone.

4. The drug material is being reduced to a fine powder.

5. The scientists all over the world found water contamination to be one of the most serious environment problems.

6. Gross deficiency causes scurvy.

6. Перепишите предложения и поставьте: 1) общий вопрос к нему; 2) специальный вопрос ко всем членам предложения.

1. This plant requires much water and good soil conditions as well.

7. Перепишите следующие предложения; подчеркните в них Participle I, Participle II, Gerund и установите функции каждого из них, т.е. укажите, является ли оно (он) определением, обстоятельством или частью сказуемого. Переведите предложения на русский язык.

1. Having read this book I can tell you my opinion of it.

2. Are you thinking of buying a house?

3. The stems as well as the leaves of this plant are used as feed for livestock.

4. Iodine used alone, gives no colour with true cellulose.

8. Перепишите следующие предложения; подчеркните в каждом из них модальный глагол или его эквивалент. Переведите предложения на русский язык.

1. We tried hard but we couldn’t persuade them.

2. We were to meet at the entrance to the theatre at a quarter to nine.

3. You are not to get your feet wet.

4. There was plenty of time, I didn’t have to leave her at once.

9. Переведите предложения.

1. В некоторых случаях травы могут иметь цветы и плоды.

2. Существует несколько групп углеродов, которые включают сахара и полисахариды, различные по сложности.

3. Процесс гидролиза является обратимым.

10. Прочитайте и письменно переведите тек­ст.

Selected Weeds.

Plant species are considered weeds when they interfere with man’s activities. Such plants grow where they are not wanted. They reduce the yield and quantity of crop.

The life span of different weeds is not uniform. Many weeds are annual or winter annual; some are biennial; and many are perennial. Also, any particular species may have both annual and winter annual forms, or annual and biennial, or biannual and perennial. We still have to learn much about the life span of weeds. Investigations of this are complicated by the influence of climate, diseases of organisms, insects and other factors.

Annuals complete their life cycles within one year. Annuals have no means of survival from one year to the next except by seeds. Winter annuals germinate in the fall and pass through one winter as seedlings or rosettes; biennials germinate in the spring or early summer and survive the winter as rosettes. Both winter annuals and biennials complete their life cycles after producing seeds in the second year.

Simple perennials persist for more than 2 years.

More difficult weeds to control are the creeping or persistent perennials spreading by means of seeds, underground lateral roots, rhizomes, above ground stolons, and stems. Control depends on the prevention of seed production and destruction of shoots and roots.

Methods of weed control are determined by the specific weed species to be controlled. Therefore the first step in deciding how to solve a weed problem is to correctly identify the weed species.