1. (2012·陕西中考)Ten years has passed ______the CCTV event People Who Moved China took place in 2002.
A. when B. while C. before D. since
【解析】选D。考查连词辨析。since自从, 引导时间状语从句, 主句用现在完成时态, 从句用一般过去时态, 故选D。
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