there will be fewer trees in the future if people cut down trees?改为疑问句

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therewillbefewertreesinthefutureifpeoplecutdowntrees?改为疑问句therewillbefewertreesinthefutureifpeoplecu

there will be fewer trees in the future if people cut down trees?改为疑问句
there will be fewer trees in the future if people cut down trees?改为疑问句

there will be fewer trees in the future if people cut down trees?改为疑问句
Will there be fewer trees in the future if people cut down them?