题目内容
20．There used to be a few houses on _____side of the road，but now there are ______．（ ）| A． | both，nothing | B． | either，nothing | C． | both，none | D． | either，none |
分析 过去在路边有一些房子，但是现在一处房子也没有了．
解答 答案：D，Both两者都；None三者或三者以上都不；Either两者之间任意一个都．由句子on _____side of the road．路共有两边，因为side是单数，可知强调的是路的任何一边，要用either，排除A C；根据语境but转折，推出路边一所房子也没有了，Nothing没有东西；None没有一处，故答案为D．
点评 本题主要考察不定代词的用法，明确选项词汇的意义及用法是本题的关键，结合语境即可知答案
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