2. Сравните данные пары предложений:

1. He was studying the properties of vitamins at that period of time. His task was studying the properties of vitamins at that period of time. 2. The main function of food is supplying a living organism with energy. This plant is still supplying our laboratory with instruments and tools. 3. They were testing a new method of quality control then I came to their laboratory. The problem was testing a new method of quality control developed by our laboratory.

В. Дополнение перевод: 1/существительным

2/неопр. ф. глагола.

1. Chemists were interested in studying the chemical changes of the food consumed by the body. 2. Their research has resulted in classifying food constituents into several groups. 3. Foods are prevented from deteriorating by different methods. 4. Like sugar, starch is built in the plant as a result of combining carbon, hydrogen and oxygen. 5. Foods are complex substances capable of meeting more than one of the body’s needs.

Г. Определение /только правое и всегда с предлогом "of"/"for"/

перевод: 1/ существительным

2/ неопр. ф. глагола

I. Переведите данные предложения на русский язык.

1. At the previous lecture students were told about the methods of preserving food. 2. Nutritionists were given the task of dettermining the amount of carbohydrates, proteins and fats in a baby diet. 3. There are three different methods for measuring enzyme activity. 4. The difficulties of studying the composition of food in the past can be explained by the lack of knowledge in chemistry. 5. The apparatus for processing cane or beet juice is called a vacuum evaporator.

2. Сравните данные пары словосочетаний:

I. the way of combining substances; the compound combining oxygen and hydrogen; 2. the process of oxidizing compounds; air oxidizing metals 3. the conditions for storing grain; elevators storing grain 4. the means of controlling temperature; the device controlling temperature 5. the method of producing starch; the factory producing starch

Д. Обстоятельство /всегда с предлогом/

перевод: 1/ деепричастием

2/ существительным с предлогом

1. Переведите данные словосочетания, обращая внимание на предлоги.

by analysing; without analysing; by being developed; without being de­veloped; by regulating; without being regulated; after having been repaired; after being built; before introducing; before being digested; on coming there; on having obtained results; in finding the way; in having been heated; with experimenting

2.Переведите данные предложения на русский язык.

1. Some vitamins are destroyed by heating. 2. Vitamin С is readily oxidized by heating. 3. Without being analysed by food technologists a new food product is not allowed for commercial manufacturing. 4. Some foods cannot be stored for a long time without being properly treated. 5. The body’s need for energy can be met by consuming food rich in carbohydrates, proteins and fats. 6. After having finished the experiment on the stability of vitamin A to heat he discussed the results obtained with the head of the laboratory. 7. Before storing grain people should clean and dry.

TEXT N 3 "FATS"

PRE-TEXT EXERCISES