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

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

.

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

A.causeB.causedC.to causeD.causing

试题答案

D

解析