Factory smoke is another pollutant that will drive the world to extinction, _____ we are vigilant.
until
when
unless
while
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Factory smoke is another pollutant that will drive the world to extinction, _____ we are vigilant.
until
when
unless
while
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Answer:
Factory smoke is another pollutant that will drive the world to extinction,while we are vigilant.
Explanation:
#carryonlearning
The answer is "when"
#BRAINLIESTS