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      , the forest fire would have been discovered much earlier.
A.But for their careB.Had they been more careful
C.Without their careD.If they were careful
B
考查特殊句式。A.要不是他们的关心    B.如果他们更谨慎点
C.没有他们的关心    D.如果他们很小心。
结合下文,森林大火会被更早的发现。可知选B最符合语境。
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