SajjadAhmad wrote:
It is widely accepted by scientists that chlorofluorocarbonsreleased into the atmosphere as a result of industrial refrigeration and insulation is the main cause of the huge gaps in the earth’s ozone layer.
(A) released into the atmosphere as a result of industrial refrigeration and insulationis
(B)released into the atmosphere as a result of industrial refrigeration and insulation are
(C)resulting from industrial refrigeration and insulation released into the atmosphere are
(D)being released
...
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