When was it you met Yao Ming in the street? A. as B. if C. while D. that——青夏教育精英家教网—

摘要： When was it you met Yao Ming in the street? A. as B. if C. while D. that

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When was it ______ you met Yao Ming in the street?

A. as B. if C. while D. that

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