if people don't stop cutting down trees,perhaps there will be no forests in twenty years' time(保持句意不变) if people don't stop cutting down trees,perhaps there will______be no forests in twenty years' time

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if people don't stop cutting down trees,perhaps there will be no forests in twenty years' time(保持句意不变) if people don't stop cutting down trees,perhaps there will______be no forests in twenty years' time

if people don't stop cutting down trees,perhaps there will be no forests in twenty years' time(保持句意不变) if people don't stop cutting down trees,perhaps there will______be no forests in twenty years' time
if people don't stop cutting down trees,perhaps there will be no forests in twenty years' time(保持句意不变) if people don't stop cutting down trees,perhaps there will______be no forests in twenty years' time

if people don't stop cutting down trees,perhaps there will be no forests in twenty years' time(保持句意不变) if people don't stop cutting down trees,perhaps there will______be no forests in twenty years' time
probably