Question:
(06) _________
-
A.
alternative -
B.
alternatively -
C.
alternativity -
D.
alter
Reference explanation:
Correct answer: A
It is one of the oldest energy sources exploited by humans and today is the most efficient (06) alternative energy source.
It is one of the oldest energy sources exploited by man and today is the most efficient alternative energy source.
Choose answer A
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