Early this year cruel snowstorms hit southern China , great transportation problems in s

发布时间：2020-08-16 12:19:10

Early this year cruel snowstorms hit southern China ,      great transportation problems in some areas .
A. causing
B. caused
C. to cause
D. having caused

网友回答

(答案→)A. causing
B. caused
C. to cause
D. having caused
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