7. Прочитав текст и уяснив его содержание, выберите из данных ниже предложений то, которое содержит правильный ответ.

1. Much attention was paid to productivity in eggs or meat. 2. The Cornish was developed in the US from Asiatic fighting stock. 3. The incubation period for both wild and domestic fowl is 31 days. 4. No other domesticated animal species (as poultry) has much universal importance as a food source. 5. Wild birds probably do not begin reproducing until they are 3 years of age.

8. В выделенных в тексте предложениях определите вид синтаксической связи. В сложноподчиненных предложениях определите тип придаточного предложения.

Вариант 3

1. Переведите следующие предложения; подчеркните в каждом из них глагол-сказуемое и определите его видовременную форму и залог.

1. The lack of thiamine (vitamin B₁) was found to cause beriberi; a deficiency of niacin was one of the causative factors in pellagra. 2. 2. The efficiency of new concentrates had been taught in our laboratory. 3. This road was being constructed for some years. 4. Kent is the best-known county for its fruit, particularly apples, pears and cherries. 5. The greenbug (aphid) is highly destructive insect of oats in certain areas of the US.

2. Переведите следующие предложения, обращая внимание на перевод модального глагола или его эквивалента.

1. It should be better to come in time. 2. A new device can fulfill much more operations. 3. They couldn't solve the problem during the last decade. 4. Milk is to keep under certain specific conditions. 5. The crop plants can be sorted into main groups.

3. Переведите следующие предложения и определите в них функции причастия.

1. Breeds had become grouped according to area of origin. 2. When heated the iron increases. 3. Being developed in early '50-s genetic became one of the most important sciences of 20-th century.

4. Переведите следующие предложения, обращая внимание на разные значения глаголов to have, to be, to do.

1. I am writing a letter now. 2. Am I to do it myself without anybody's help? 3. Do you have any agricultural qualifications? 4. I had to do it before midnight. 5. I do understand the importance of education.

5. Переведите следующие предложения и определите тип условного предложения.

1. If scientists do not select new varieties of cereals, there will be no progress in agriculture. 2. The crops would not have damaged, if the insecticides against the greenbug had been available. 3. If it were not profitable to plant cereals, the volunteer oats, wheat and barley would have leading positions.

6. Прочтите и письменно переведите текст.

diseaseS AND PESTS

1. The organism is likely to cause extensive damage when potatoes are grown in alkaline or "sweet" soils, or in soils that are about neutral, but it causes little or no damage in acid soils. At a pH of 5.0 or slightly above, scab usually is not a problem. An application of fresh manure just before plowing and planting favors the development of common scab. In like manner, applications of lime and wood ashes make the soil more alkaline, the infection is likely to be more severe. Manure produced by livestock that are fed potatoes infected with scab is an important source of infection after it has been spread on fields. Diseased tubers that are discarded and spread on land to be used for growing potatoes later on are also an important source of infection. The disease tends to be more prevalent when successive crops of potatoes, particularly susceptible varieties, are grown or if potatoes follow other crops such as sugar beets and red beets which are also susceptible to the organism. Practices that aid in the control of common scab include the use of a) resistant varieties, b) crop rotation, c) cultural and sanitation practices, d) proper soil acidity, and e) soil treatment.

2. The greenbug (aphid) is highly destructive insect of oats in certain areas of the United States. This insect sucks the juices of the plant and under favourable conditions reproduces rapidly by giving birth to young during the summer and later by laying eggs. The leaf tissue upon which the greenbug feeds turns to a typical yellow or reddish color. Moderate infestations of the insect may kill sizeable areas and heavy infestations may destroy entire fields.

3. Insecticides are available which are effective against the greenbug but since the insect may be present in the field from time oats emerge until maturity, their use is generally not practical. Destruction of volunteer oats, wheat and barley plants is a helpful control measure. No resistant varieties are available at the present time, but differences in tolerance to the insect have been noted" and efforts are being made to incorporate this factor in adapted varieties.

4. Control measures for the corn borer include a) the use of proper cultural methods, b) resistant or tolerant hybrids, and c) insecticides. The European corn borer has a number of natural enemies such as birds, diseases and certain insects. Considerable attention has been given to discovering insect parasites that might be effective in controlling the corn borer. Research workers at the U. S. Department of Agriculture European Corn Borer Laboratory studied the possibility of controlling these insects by inhibiting the mating of the corn borer moth through the use of a sex attractant.