题目内容
–Are you_______the edge of the canyon--No,we’re still _______the bottom of it.
A. on;at B. at;at C. on;in D. at;on
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题目内容
–Are you_______the edge of the canyon--No,we’re still _______the bottom of it.
A. on;at B. at;at C. on;in D. at;on