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26. Find information about air pollution or water pollution indexes in
your region or do an independent research. Write a report about air
quality or water quality in your region and present it in class.
GRAMMAR REVIEW
Revise WORD BUILDING (Appendix 2) and do the Activities 24–31.
27. Use prefixes to form new words. Translate the words.
re – to construct, to make, to build, to heat, to produce
super – man, critical, low, to cool, to heat
sub – group, way, normal, tropical, to divide
over – to work, to boil, to produce, to value, to pay, pressure
semi – automatic, conductor, official, circle
inter – national, atomic, act, change, communication
un – able, obtainable, capable, productive, important, successful, natural,
limited, equal, known, practical
in – efficient, dependent, visible, complete, definite
im – possible, pure, measurable
non – parallel, ferrous, conductive, metallic
28. Translate phrases into Russian. Mind prefixes.
A lot of unsolved problems, under unusual conditions, inaccurate
amount, irregular form, impossible situation, to misunderstand the drawing,
to reassemble the model, to reread the article, supernatural phenomenon, to
overcool the substance, to overheat the alloy, semiconductor materials, se-
miautomatic machine-tools, intercontinental communication.
29. Read the sentences below and define the parts of speech words in
bold belong to. Translate the phrases into Russian.
To conduct a time service, a conductor of electricity, a semiconductor
device, the conductivity of this metal, the conduction of electrons, good
conductance, conducting capacity; to observe stars, an accurate observa-
tion, a careful observer, astronomical observatory instruments, an observ-
able phenomenon; electric power, a power station, a powerful telescope,
technical progress, highly skilled technician, modern technique.
30. Use suffixes given below to form nouns. Translate the words.
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