.On average, there are 800 tornadoes in the U.S. each year, about 80 deaths and 1,500 inj

发布时间：2020-08-16 09:28:38

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On average, there are 800 tornadoes in the U.S. each year,      about 80 deaths and 1,500 injuries.
A. cause
B. caused
C. to cause
D. causing

网友回答

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