Thus one simple fact, a change in the number of wolves, had an effect the whole wildlife chain of the plains. A. to B. at C. on D. in 查看更多

 

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Thus one simple fact, a change in the number of wolves, had an effect      the whole wildlife chain of the plains.

A. to                   B. at               C. on                  D. in

 

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Thus one simple fact, a change in the number of wolves, had an effect      the whole wildlife chain of the plains.

A. to                   B. at               C. on                  D. in

 

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