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 Onaverage,thereare800tornadoesintheUSeachyear,

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问题详情:

 Onaverage,thereare800tornadoesintheUSeachyear,

 On average, there are 800 tornadoes in the US each year, ______ about 80 deaths and 1,500 injuries.

A. have caused         B. causing          C. caused              D. to be causing


【回答】

B

知识点:非谓语动词

题型:选择题

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