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iii
Read the following short texts and fill in the gaps (1-14) using the correct forms ofBog'liq 4 PROFESSIONAL ENGLISHiii
Read the following short texts and fill in the gaps (1-14) using the correct forms of
the words in brackets.
Cheap Solar Panels.
One problem with the solar cell industry is that the production of photovoltaic
solar panels is
1) _______
(rely)
on relatively expensive materials. Electricity from even the most
2) _______
(commerce)
workable solar cells is already five times the price of that from coal plants
3) _______
(make)
it less economically sound and less likely to be adopted on a large scale. The
solar power industry is, therefore, turning to
4) _______
(cheap)
alternatives. For example,
5) _______
(engine)
at Berkeley have created solar cells using cheap copper oxide and zinc oxide.
The low cost of these prototype cells means they only need to produce a third as much power to
become commercially viable. Other innovations in solar technology such as nano coatings
6) _______
(large)
the efficacy of solar panels are also already increasing the
7) _______
(economy)
efficiency of solar technology.
Tidal Energy.
Governments and private investors
8) _______
(like)
are starting to examine the
potential of
9) _______
(environment)
friendly forms of energy production, on a mass scale. One
such solution is offered by tidal energy, which falls into two categories: energy
10) _______
(generate)
either by harnessing the power of tidal currents, or utilising the
11) _______
(differ)
between high tide and low tide. For instance, Tidal Stream Systems are an example of the first
category. Often they resemble
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