______ the local authorities put more attention to the safety of the children, more than 20 lives __________ in Gansu ProvinceA.Should, would not be claimedB.Had, would not have been claimedC.Should, would not be costD.Had, would not have been cost
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B解析试题分析：考查虚拟语气和动词：句意：如果当地政府把更多的注意力放在孩子的安全上，甘肃省的20多个孩子的生命就不会被夺取了。这是和过去相反的虚拟语气，if条件句应该用过去完成时，也可以省略if把had提前，主句用would have done，