The past 30 years has ______ the great changes that have taken place in China.A.seenB.noticedC.watchedD.looked
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A解析试题分析：考查动词：A. seen 看见，见证B. noticed注意到C. watched观察D. looked看，句意：过去30年已经见证的中国的巨大变化。选A。考点：考查动词辨析
点评：考查动词关键是掌握不同词的确切含义，相似的词要辨析清楚，还要结合及物不及物考虑。有的单词属于一词多义，要多记忆。