NMET2002,34题是这样的: The research is so designed that once_____________nothing can be done to change it. A.begins B.having begun C.beginning D.begun 这道高考题所选答案为D,其实是在begun前省去了主语it(the research)和...NMET2002,34题是这样的: The research is so designed that once_____________nothing can be done to change it. A.begins B.having begun C.beginning D.begun 这道高考题所选答案为D,其实是在begun前省去了主语it(the research)和助动词is,是一个由once引导的缩略状语从句。英语中。展开更多
文摘NMET2002,34题是这样的: The research is so designed that once_____________nothing can be done to change it. A.begins B.having begun C.beginning D.begun 这道高考题所选答案为D,其实是在begun前省去了主语it(the research)和助动词is,是一个由once引导的缩略状语从句。英语中。
