Е. С. Закирова, П. А. Красавин Английский язык для технических вузов



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b) 
 
find words in the text whose meanings are opposite to the meanings of the 
following words:
narrow, easy, practice, artificial, old, more, to begin, small, little;
c) replace the words in italics with the words with similar and opposite meanings:
1. He happened to meet her in that 
broad 
street. 2. They are investigat-
ing 
complex
problems. 3. It was a very 
difficult
experiment. 4. They 
started
re-
searching this problem. 5. It was a 
big
contribution.
Exercise 15. Complete the sentences: change the word in capitals at the end 
of each sentence to form a word that fits suitably in the blank space.
1. … examine the structure of the cells SEARCH.
2. The … of radio and television changed our leisure time INVENT.
3. This theory was … proved EXPERIMENT.
4. He has won a prize at the … conference NATION.
5. There are … scientific fields DIFFER.
Exercise 16. Insert the words at the sentence level: fill in the blanks with the 
missing words (the first letter of each word is given).
1. Science d… with a variety of subjects. 2. Scientists s… for the answers to 
the different questions. 3. The structure of the cells is e… by scientists. 4. Dif-

60
ferent theories u… the facts. 5. The b… of some scientific fields are not clear. 
6. Natural, social and technical sciences are closely i… 7. T… the ages, people 
have invented tools, machines, and materials to make work easier. 8. Science 
c… much to modern technology. 9. Some modern technologies d… on science. 
10. During our l… time we watch TV.
GRAMMAR DEVELOPMENT
Exercise 17. Point out the sentences with the Perfect Tenses in the text and pro-

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