问题标题:
Ifthere_(be)fewertress,there_(be)morepollution
问题描述:

Ifthere_(be)fewertress,there_(be)morepollution

姜汉斌回答:
  此句用虚拟语气较妥:   Iftherewerefewertrees(拼写错误),therewouldbemorepollution.
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