Question

      , the forest fire would have been discovered much earlier.

A．But for their care	B．Had they been more careful
C．Without their care	D．If they were careful

Answer 1

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。