题目内容
11．It's said that the prices of fixed gear bicycleshave risen （rise） a lot recently．分析 据说，固定齿轮自行车的价格最近上涨了很多．
解答 答案：have risen 提示词rise，动词，上升，上涨．根据the prices of fixed gear bicycles____ （rise） a lot recently．可知是说固定齿轮自行车的价格最近上涨了很多．说的是现在的情况．再根据时间状语recently，可知应该用现在完成时态，强调对于现在产生的影响；现在完成时态的构成：have/has+过去分词．主语是the prices为复数，故填：have risen．
点评 本题主要考查完成句子，首先要根据所给汉语提示，写出相关的英语单词，然后根据句式特点，结合时态，语态，短语，句型等，确定单词的适当形式，最后把句子补充完整．
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