10. A.recycle B.preserve C.keep D.use
XII. Choose the word or phrase (A, B, C or D) that best fits the blank space in the
following passage:
There is now increasing concern about the world’s energy (1) ... particularly about
those involving fossil (2) ...In less than a hundred years we shall probably (3)... all
the present (4)... of oil and gas. The world’s coal (5)... should last longer but, once
used, these cannot be (6)... It is important, therefore, that we should develop such
(7)... sources of energy as solar energy as well as water and wind (8)... , classed
as (9)... energy. Until these energy (10)... are widely used, it is important for the
developed countries to reduce energy consumption as much as possible.
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