摘要： All possible means . However, nothing can Jack from adventuring in that mysterious forest. A. has tried; stop B. has been tried; keep C. have tried; keep D. have been tried; prevent [解析]选D.考查主谓一致.句意: 千方百计也无法阻止杰克到密林中去探险.由means短语修饰名词作主语, 谓语根据意义一致原则可知, every means谓语动词用单数,all means谓语动词用复数.

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