If the prediction for the earthquake more accurate, we would have been more prepared and

If the prediction for the earthquake more accurate, we would have been more prepared and many more lives would have been saved.
A. had been
B. was
C. has been
D. were

(答案→)A. had been B. wasC. has been D. were解析：考查虚拟语气。语境表示假如地震的预测更准确，我们就能做好准备，很多生命就不会失去了，主句使用了would have done，因此表示与过去实际情况相反的假设，状语从句用过去完成时，因此选A。

我明天再问问老师，叫他解释下这个问题