YDS YARIM CÜMLE / TEST 8 38. Soru

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38.

……….; however, they realise that solar
technology is still in its infancy.

Scientists believe that heat from
the sun is an important new
source of energy

Most of the houses had been
adapted to using the sun's rays to
heat water

Many calculators will not work in
dark rooms

Very few of the houses in the
village had even got running water

Research is still being done into
the possibility of harnessing wind
power