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In the past 30 years, no human being foot on another world. [ ]A. has set B. had

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In the past 30 years, no human being foot on another world. [ ]A. has set B. had

In the past 30 years, no human being____ foot on another world.[     ]A. has set            
B. had set          
C. set                
D. sets

试题答案

A