27) The instructions ____ by Professor Johnson helped us know more about
the danger of energy pollution.
A. that explained B. explained C. explaining D. which explained
C. READING
* Circle the item among A, B, C or D that best answers the question about the
passage.
Energy is fundamental to human beings, especially to poor people – the
one- third of humanity that does not have modern energy supplies like
electricity, with which their life could be improve.
Many people who live in countryside have to gather fuel wood. This takes
a lot of time. Moreover, it causes indoor air pollution because of heavy smoke.
For many people living in rural areas in developing countries of the world,
biogas is the large energy resources available and costs almost nothing. The
main use of biogas is for cooking and heating. As biogas is smoke-free, it helps
solve the problem of indoor air pollution. Moreover, plant waste and animal
manure cost almost nothing.
The tendency to use renewable energy sources is on the increase when
non-renewable ones are running out. In the near, people in the developing
countries may use wind or sea waves as the environment-friendly energy
sources.
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