The earthquake in Japan, measuring 9.0 on the Richter Scale, was so violent cause a series of explosions of the nuclear reactors in several power stations.
A. to
B. that
C. as to
D. as that
网友回答
A. to
B. that
(答案→)C. as to
D. as that
解析：考查固定结构。地震如此猛烈以至于引起了核爆炸。用“如此。。。以至于”结构，且 cause a series of explosions of the nuclear reactors in several power stations.不是句子，所以选C。