题目内容
The research is so designed that once _______ nothing can be done to change it.
A. begins B. having begun C. beginning D. begun
D
解析:
“连词+分词”作状语,依然由句子主语与分词的关系来确定,主动关系用现在分词,被动关系用过去分词。the research 与 begin 是被动关系,用过去分词 begun。
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题目内容
The research is so designed that once _______ nothing can be done to change it.
A. begins B. having begun C. beginning D. begun
D
“连词+分词”作状语,依然由句子主语与分词的关系来确定,主动关系用现在分词,被动关系用过去分词。the research 与 begin 是被动关系,用过去分词 begun。
|