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The manager was satisfied to see many new products ______ after great effort.
A.having developed B.to developC.developedD.develop
C

试题分析:分析结构可知此处是“see +宾语+补语”结构,动词develop和宾语之间存在被动关系,应该用过去分词,故答案选C。句意:经理很满意得看到经过努力后许多新产品被研制了出来。
【知识拓展】判断现在分词或过去分词做补语的方法是:看动词和宾语之间的关系,如果是主动关系,则用现在分词,而如果是被动关系则用过去分词。比如:We saw the bird fly away。我们看到鸟飞走了。 He found himself tied to a tree 。他发现自己被捆在树上。
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