题目内容
1．She promised to do all she canto help（help） me but she failed to do that．分析 她答应尽一切可能帮助我，但她没能做到．
解答 答案：to help．
根据She promised to do all she can--（help） me but she failed to do that，可知她答应尽一切可能帮助我，但她没能做到．这里to引导的不定式短语表目的，所以这里用to help．故填to help．
点评 解答此类试题时，务必仔细分析句子的结构和句子的成分，考虑单词的适当形式．
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A：Is that so？（52）Are there any beautiful mountains？B：Yes．And many of them are famous，such as Mount Tai，Mount Huang and Mount Emei．
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B：（51）Just a littleChina is a big country that has about 5，000 years of history．It attracts
many tourists from all over the world every year．
A：Is that so？（52）Are there any beautiful mountains？B：Yes．And many of them are famous，such as Mount Tai，Mount Huang and Mount Emei．
A：（53）What about rivers？B：There are many rivers in China．Among them the Yangtze River is the longest one and the
second longest one is the Yellow River．（54）They're the birth places of Chinese cultureA：Anything else？
B：Sorry．That's all know．If you want to learn more，you can read Guide to China．（55）It's a book which introduces China in detailA：Thanks．I'll read it．
| A．Just a little． B．What about rivers？ C．I don't know it at all． D．Are there any beautiful mountains？ E．They're the birthplaces of Chinese culture． F．It's a book which introduces China in detail． |