_________, the forest fire would have been discovered much earlierA.But for their careB.If they were carefulC.Without their careD.Had they been more careful
网友回答
D解析考查虚拟语气。本题考查与过去事实相反的虚拟语气，从句Had they been more careful = If they had been more careful。句意：如果不是他们更小心点，森林大火将会更早的被发现。