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：考查句型搭配。 因为句中有so violent故选择B， C。 So ……that+ 完整句子，so ……as to do ，故选择C